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1. Photoproduction of mesons in electron-proton collisions at HERA

Author: S. Aid, V. Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Bähr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, R. Barschke, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, G. Bernardi, R. Bernet, G. Bertrand-Coremans, M. Besançon, R. Beyer, P. Biddulph, P. Bispham, J.C. Bizot, V. Blobel, K. Borras, F. Botterweck, V. Boudry, A. Braemer, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, M.J. Burton, G. Buschhorn, A.J. Campbell, T. Carli, M. Charlet, D. Clarke, A.B. Clegg, B. Clerbaux, S. Cocks, J.G. Contreras, C. Cormack, J.A. Coughlan, A. Courau, M.-C. Cousinou, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, C.L. Davis, B. Delcourt, A. De Roeck, E.A. De Wolf, M. Dirkmann, P. Dixon, P. Di Nezza, W. Dlugosz, C. Dollfus, J.D. Dowell, H.B. Dreis, A. Droutskoi, D. Düllmann, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, R.J. Ellison, E. Elsen, M. Erdmann, W. Erdmann, E. Evrard, A.B. Fahr, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, B. Fominykh, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, F. Gaede, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, A. Glazov, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, K. Golec-Biernat, B. Gonzalez-Pineiro, I. Gorelov, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, R.K. Griffiths, G. Grindhammer, A. Gruber, C. Gruber, J. Haack, T. Hadig, D. Haidt, L. Hajduk, M. Hampel, W.J. Haynes, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, W. Hildesheim, K.H. Hiller, C.D. Hilton, J. Hladký, K.C. Hoeger, M. Höppner, D. Hoffmann, T. Holtom, R. Horisberger, V.L. Hudgson, M. Hütte, H. Hufnagel, M. Ibbotson, H. Itterbeck, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Jönsson, K. Johannsen, D.P. Johnson, L. Johnson, H. Jung, P.I.P. Kalmus, M. Kander, D. Kant, R. Kaschowitz, U. Kathage, J. Katzy, H.H. Kaufmann, O. Kaufmann, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, T. Köhler, J.H. Köhne, H. Kolanoski, F. Kole, S.D. Kolya, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, U. Krüner-Marquis, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, D. Lacour, B. Laforge, R. Lander, M.P.J. Landon, W. Lange, U. Langenegger, J.-F. Laporte, A. Lebedev, F. Lehner, C. Leverenz, S. Levonian, Ch. Ley, G. Lindström, M. Lindstroem, J. Link, F. Linsel, J. Lipinski, B. List, G. Lobo, H. Lohmander, J.W. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, G. Martin, R. Martin, H.-U. Martyn, J. Martyniak, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, T. Merz, A. Meyer, H. Meyer, J. Meyer, P.-O. Meyer, A. Migliori, S. Mikocki, D. Milstead, J. Moeck, F. Moreau, J.V. Morris, E. Mroczko, D. Müller, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, H. Niggli, R. Nisius, G. Nowak, G.W. Noyes, M. Nyberg_Werther, M. Oakden, H. Oberlack, U. Obrock, J.E. Olsson, D. Ozerov, P. Palmen, E. Panaro, A. Panitch, C. Pascaud, G.D. Patel, H. Pawletta, E. Peppel, E. Perez, J.P. Phillips, A. Pieuchot, D. Pitzl, G. Pope, S. Prell, R. Prosi, K. Rabbertz, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, H. Rick, V. Riech, J. Riedlberger, F. Riepenhausen, S. Riess, E. Rizvi, S.M. Robertson, P. Robmann, H.E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, N. Sahlmann, D.P.C. Sankey, P. Schacht, S. Schiek, S. Schleif, P. Schleper, W. von Schlippe, D. Schmidt, G. Schmidt, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, F. Sefkow, M. Seidel, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, J.R. Smith, V. Solochenko, Y. Soloviev, A. Specka, J. Spiekermann, S. Spielman, H. Spitzer, F. Squinabol, R. Starosta, M. Steenbock, P. Steffen, R. Steinberg, H. Steiner, B. Stella, A. Stellberger, J. Stier, J. Stiewe, U. Stöβlein, K. Stolze, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, J. Theissen, C. Thiebaux, G. Thompson, P. Truöl, J. Turnau, J. Tutas, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Vallée, D. Vandenplas, P. Van Esch, P. Van Mechelen, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, A. Walther, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, T. Wengler, M. Werner, L.R. West, T. Wilksen, S. Willard, M. Winde, G.-G. Winter, C. Wittek, E. Wünsch, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, F. Zomer, J. Zsembery, K. Zuber, and M. zurNedden
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Proton, Meson, High Energy Physics::Phenomenology, Order (ring theory), Parton, HERA, Charm quark, High Energy Physics::Experiment, Rapidity, Nuclear Experiment
Abstract: At the electron-proton collider HERA the inclusive D-*+/- meson photoproduction cross section has been measured with the H1 detector in two different, but partly overlapping, kinematical regions. For the first, where [W-gamma p] approximate to 200 GeV and Q(2) < 0.01 GeV2, the result is sigma(gamma p --> c(c) over barX$) = (13.2 +/- 2.2(-1.7-4.8)(+2.1+9.9)) mu b. The second measurement for Q(2) < 4 GeV2 yields sigma(gamma p) --> c(c) over barX$) = (9.3 +/- 2.1(-1.8-3.2)(+1.9+6.9)) mu b at [W-gamma p] approximate to 142 GeV and sigma(gamma p --> c(c) over barX$) = (20.6 +/- 5.5(-3.9-7.2)(+4.3+15.4)) mu b at [W-gamma p] approximate to 230 GeV, respectively. The third error accounts for an additional uncertainty due to the proton and photon parton density parametrizations. Differential cross sections are presented as a function of the D-*+/- transverse momentum and rapidity. The results compare reasonably well with next-to-leading order QCD calculations. Evidence for diffractive photoproduction of charm quarks is presented.
Published: 1996
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2. Elastic electroproduction of ϱ and mesons at large Q2 at HERA

Author: S. Aid, V Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Bähr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, R. Barschke, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, G. Bernardi, R. Bernet, G. Bertrand-Coremans, M. Besançoni, R. Beyer, P. Biddulph, P. Bispham, J.C. Bizot, V. Blobel, K. Borras, F. Botterweck, V. Boudry, A. Braemer, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, W. Büsser, A. Buniatian, S. Burke, M.J. Burton, G. Buschhorn, A.J. Campbell, T. Carli, F. Charles, M. Charlet, D. Clarke, A.B. Clegg, B. Clerbaux, S. Cocks, J.G. Contreras, C. Cormack, J.A. Coughlanf, A. Courauab, M.-C. Cousinou, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, C.L. Davis, B. Delcourt, A. De Roec, E.A. De Wolf, M. Dirkmann, P. Dixon, P. Di Nezza, W. Dlugosz, C. Dollfus, J.D. Dowell, H.B. Dreis, A. Droutskoi, D. Dullmann, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, R.J. Ellison, E. Elsen, M. Erdmann, W. Erdmann, E. Evrard, A.B. Fahr, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, B. Fominykh, J. Formanek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, F. Gaede, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, A. Glazov, U. Goerlac, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, K. Golec-Biernat, B. Gonzalez-Pineiro, I. Gorelov, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, R. Griffiths, G. Grindhammer, A. Gruber, C. Gruber, J. Haack, D. Haidt, L. Hajduk, M. Hampel, W.J. Haynes, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, W. Hildesheim, K.H. Hiller, C.D. Hilton, J. Hladký, K.C. Hoeger, M. Höppner, D. Hoffmann, T. Holtom, R. Horisberger, V.L. Hudgson, M. Hütte, H. Hufnagel, M. Ibbotson, H. Itterbeck, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Johnson, K. Johannsen, D.P. Johnson, H. Jung, P.I.P. Kalmus, M. Kander, D. Kant, R. Kaschowitz, U. Kathage, J. Katzy, H.H. Kaufmann, O. Kaufmann, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, T. Köhler, J.H. Köhne, H. Kolanoski, F. Kole, S.D. Kolya, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, U. Krüner-Marquis, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, D. Lacour, B. Laforgei, R. Lander, M.P.J. Landon, W. Lange, U. Langenegger, J.-F. Laporte, A. Lebedev, F. Lehner, C. Leverenz, S. Levonian, Ch. Ley, G. Lindström, M. Lindstroem, J. Link, F. Linsel, J. Lipinski, B. List, G. Lobo, H. Lohmander, J.W. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, G. Martin, R. Martin, H.-U. Martyn, J. Martyniak, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meyer, T. Merz, A. Meyer, H. Meyer, J. Meyer, R-O. Meyer, A. Migliori, S. Mikocki, D. Milstead, J. Moeck, F. Moreau, J.V. Morris, E. Mroczko, D. Müller, G. Müller, K. Miiller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, H. Niggli, R. Nisius, G. Nowak, G.W. Noyes, M. Nyberg-Werther, M. Oakden, H. Oberlack, U. Obrock, J.E. Olsson, D. Ozerov, P. Palmen, E. Panaro, A. Panitch, C. Pascaud, G.D. Patel, H. Pawlett, E. Peppel, E. Perez, J.P. Phillips, A. Pieuchot, D. Pitzl, G. Pope, S. Prell, R. Prosi, K. Rabbertz, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, H. Rick, V. Riech, J. Riedlberger, F. Riepenhausen, S. Riess, E. Rizvi, S.M. Robertson, P. Robmann, H.E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, N. Sahlmann, D.P.C. Sankey, P. Schacht, S. Schiek, S. Schleif, P. Schleper, W. von Schlippe, D. Schmidt, G. Schmidt, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, F. Sefkow, M. Seidel, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, J.R. Smith, V. Solochenko, Y. Soloviev, A. Specka, J. Spiekermann, S. Spielman, H. Spitzer, F. Squinabol, R. Starosta, M. Steenbock, P. Steffen, R. Steinberg, H. Steiner, B. Stella, A. Stellberger, J. Stier, J. Stiewe, U. Stöβlein, K. Stolze, U. Straumann, W. Struczinski, J.P Sutton, S. Tapprogge, [au M. Taševský, V. Tchernyshov, S. Tchetchelnitski, J. Theissen, C. Thiebaux, G. Thompson, P. Truöl, J. Turnau, J. Tutas, P. Uelkes, A. Usik, S. Valkár, A. Valkdrovd, C. Vallée, D. Vandenplas, P. Van Esch, P. Van Mechelen, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, A. Walther, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, T. Wengler, M. Werner, L.R. West, T. Wilksen, S. Willard, M. Winde, G.-G. Winter, C. Wittek, E. Wünsch, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, M. Zimmer, F. Zomer, J. Zsembery, K. Zuber, and M. zurNedden
Subjects: Physics, Nuclear and High Energy Physics, Cross section (physics), Particle physics, Luminosity (scattering theory), Meson, Proton, Momentum transfer, Theoretical models, High Energy Physics::Experiment, HERA, Nuclear Experiment
Abstract: The total cross sections for the elastic electroproduction of $\rh0$ and $J/\Psi$ mesons for $Q^2$ $>$ 8 GeV$^2$ and $ \simeq 90$ GeV/c$^2$ are measured at HERA with the H1 detector. The measurements are for an integrated electron$-$proton luminosity of $\simeq$~3~pb$^{-1}$. The dependences of the total virtual photon$-$proton ($\gamma^* p$) cross sections on $Q^2$, $W$ and the momentum transfer squared to the proton ($t$), and, for the $\rho$, the dependence on the polar decay angle ($\cos \theta^*$), are presented. The $J/\Psi$ : $\rh0$ cross section ratio is determined. The results are discussed in the light of theoretical models and of the interplay of hard and soft physics processes.
Published: 1996
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3. Measurement of the total photon proton cross section and its decomposition at 200 GeV centre of mass energy

Author: C. Cormack, G. G. Winter, C. Vallée, J. Martens, P. Steffen, R. D. Appuhn, F. Kole, K. Rüter, U. Stößlein, C. Niebuhr, J. H. Köhne, D. Zarbock, H. P. Wellisch, R. Nahnhauer, D. Goldner, Max Weber, E. Malinovski, E. Barrelet, David Cussans, P. Goritchev, B. Laforge, Y. Soloviev, T. Carli, M. Kuhlen, G. Grindhammer, Paul Newman, V. L. Hudgson, E. A. De Wolf, Ch. Berger, Karlheinz Meier, K. Rosenbauer, C. Wittek, G. Lindström, C. Gruber, Dusan Bruncko, K. Rybicki, D. Neyret, L. Büngener, H. Krehbiel, A. Pieuchot, T. Mavroidis, B. Naroska, F. Ferrarotto, M. Jaffre, J. E. Olsson, H. Genzel, A. Lebedev, M. Korn, S. Egli, Christoph Grab, G. Thompson, W. Bartel, I. Herynek, K. Daum, G. Knies, T. Greenshaw, P. Bispham, J. Haack, Stephen Maxfield, I. O. Skillicorn, H. B. Dreis, U. Bassler, M. Charlet, G. Buschhorn, G. Bertrand-Coremans, R. Starosta, D. Ozerov, D. Düllmann, Rosario Martín, R. J. Ellison, M. Rietz, D. Haidt, K. C. Hoeger, Murrough Landon, A. E. Wright, H. Itterbeck, Wolfgang Lange, P. Van Mechelen, B. Waugh, G. Weber, H. Henschel, F. W. Büsser, F. Zomer, U. Straumann, H. J. Behrend, J.C. Bizot, M. Goldberg, J. Stiewe, P. Van Esch, E. Evrard, Eram Rizvi, L. Del Buono, L. Criegee, Grzegorz Nowak, W. Braunschweig, C. Jacobsson, A. Gellrich, V. Riech, F. Sefkow, J. P. Sutton, Claus Kleinwort, V. Andreev, G. Heinzelmann, D. Kant, Kerstin Borras, A. Semenov, M. Fleischer, P. Ribarics, T. Jansen, R. Felst, J. Formánek, A. B. Clegg, Andrew Mehta, S. Schiek, S. Tapprogge, H. Spitzer, Armen Vartapetian, M. Hapke, R. Sell, Benno List, J. Gayler, I. R. Kenyon, S. Kazarian, G. Villet, Barbara Clerbaux, R. Kaschowitz, Pierre Marage, E. Mroczko, M. Gebauer, B. Delcourt, D. Vandenplas, H. Küster, F. Brasse, V. Korbel, W.D. Dau, D. Lüke, A. Wegner, N. Gogitidze, H. Rick, J. B. Dainton, U. Siewert, F. Lamarche, A. Rostovtsev, A. Droutskoi, G. Rädel, C. Leverenz, J. Garvey, O. Hamon, S. Levonian, J. Zsembery, J. M. Link, E. Panaro, J. Kurzhöfer, H. Ehrlichmann, E. Wünsch, V. Solochenko, M. Zimmer, A. M. Fomenko, J. D. Dowell, Dave Sankey, M. Wagener, Roland Horisberger, A. Valkárová, U. Kathage, Vincent Boudry, M. Hampel, B. Kuznik, A. Meyer, Ph. Huet, V. Brisson, Yves Sirois, Jean-Francois Laporte, V. Nagovizin, G. D. Patel, P. Loch, S. Riess, Ch. Pichler, K. Gabathuler, A. Buniatian, Jean-Arcady Meyer, D. Wegener, W.J. Haynes, R. Gerhards, M. J. Burton, J. Lipinski, R. Bernet, K. Flamm, G. Franke, Yong Ban, N. Magnussen, K. Johannsen, P. Verrecchia, J. Žáček, A. Courau, Christophe Royon, J. Feltesse, S. Eichenberger, G. Martin, David Schmidt, J. Bähr, S. Spielman, T. Köhler, M. W. Krasny, V. Schröder, S. Schleif, K. H. Hiller, R. C. W. Henderson, N. Sahlmann, H. H. Kaufmann, Eckhard Elsen, Wolfram Erdmann, E. Schuhmann, Winston Ko, S. Aid, P. I. P. Kalmus, J. V. Morris, G. Schmidt, C. Pascaud, V. Efremenko, P. Hill, F. Linsel, P.-O. Meyer, G. W. Noyes, Martin Erdmann, U. Obrock, Zhen Zhang, Guenter Eckerlin, André Schöning, S. Mani, A. Walther, P. Biddulph, Hermann Kolanoski, D. Clarke, H. E. Roloff, M. Forbush, S. Mikocki, J. Bán, J. Tutas, F. Niebergall, J. D. Burger, H. P. Beck, Stephen Burke, A. Braemer, D. Mercer, M. A. Jabiol, W. Zimmermann, Gianfranco Sciacca, J. Riedlberger, H. Hufnagel, J. W. Lomas, I. Sheviakov, D. Newton, V. Lubimov, R. Prosi, J. Ebert, S. Masson, Leif J. Jönsson, John A Coughlan, A. Usik, K. Stolze, M. Höppner, C. A. Meyer, S. Prell, P. Dixon, H. Lohmander, P. Lanius, A. Gruber, R. Buchholz, L. N. Shtarkov, U. Krüger, A. Migliori, Horst Oberlack, Markus Seidel, A. Glazov, V. Tchernyshov, G. Siegmon, H. U. Martyn, Matthias Klein, David Milstead, P. A. Smirnov, Ch. Ley, A. Panitch, C.D. Hilton, J.G. Contreras, Daniel Johnson, R. Beyer, S. Dagoret, P. Palmen, L. Goerlich, F. Moreau, J. Hladký, F. Lehner, J. Theissen, J. Duboc, B. Stella, D. Feeken, A. Jacholkowska, B. Gonzalez-Pineiro, K. Stephens, E. Peppel, M. Arpagaus, S. D. Kolya, M. Oakden, R. Marshall, Dirk Krücker, R. Roosen, J. Ferencei, V I. Shekelyan, A. Wagener, S. Reinshagen, J. Martyniak, K. Wacker, R. Steinberg, J. Spiekermann, R. L. Lander, Daniel Pitzl, Frank Raupach, S. M. Robertson, N. Wulff, B. Fominykh, P. Kasselmann, F. Charles, J. Katzy, H. K. Nguyen, I. V. Gorelov, K. Müller, R.K. Griffiths, R. Grässler, Ch. Coutures, W. Struczinski, U. Krüner-Marquis, G. Müller, M. F. Hess, Emmanuelle Perez, G. Lobo, P. Kostka, J. M. Foster, S. Bourov, Carl R. Brune, M. Barth, J. Turnau, K. Zuber, Eckhart Fretwurst, M. Steenbock, S. K. Kotelnikov, L. Hajduk, B. Andrieu, H. Meyer, S. Kermiche, W. Hildesheim, J. Cvach, Ch. Niedzballa, P. Di Nezza, Peter Robmann, S. Willard, M. Winde, P. Uelkes, Didier Lacour, M. Hütte, L. Johnson, G. Pope, Steve McMahon, P. Baranov, O. Dünger, F. Botterweck, Peter Schleper, T. Krämerkämper, R. Maraček, W. von Schlippe, Marc Besancon, A.S. Belousov, Sergey Rusakov, T. Merz, P. Truöl, H. Pawletta, R. Nisius, J. R. Smith, E. Eisenhandler, Th. Naumann, H. Duhm, E. Gabathuler, M. David, C.L. Davis, M. Flieser, J. Stier, J. Marks, Y. Vazdik, L.R. West, M. Nyberg-Werther, T. R. Ebert, A. Fedotov, Günter Flügge, T. P. Yiou, M. zurNedden, C. Kiesling, A. De Roeck, A. J. Campbell, T. Kurča, J. Janoth, Volker Blobel, R. Eichler, G. Cozzika, F. Eisele, C. Keuker, J.P. Phillips, Klaus Rabbertz, Stefan Valkar, Hannes Jung, Alexander Zhokin, B. Schwab, Pavel Murin, H. Grässler, M. Ibbotson, R. Barschke, Laurent Favart, C. Dollfus, F. Rouse, Ulrich Goerlach, T. C. Nicholls, Peter Schacht, G. C. Lopez, Gregorio Bernardi, Anton Babaev, C. Thiebaux, J. Strachota, and P. E. Reimer
Subjects: Nuclear physics, Physics, Elastic scattering, Particle physics, Cross section (physics), Photon, Physics and Astronomy (miscellaneous), Proton, Detector, High Energy Physics::Experiment, Center of mass, HERA, Dissociation (chemistry)
Abstract: We present a new measurement of the total photoproduction cross section performed with the H1 detector at HERA. For an average centre of mass energy of 200 GeV a value of σtotλp=165±2±11µb has been obtained. A detailed analysis of the data in adequate kinematic regions enabled a decomposition of the total cross section in its elastic, single diffractive dissociation and remaining non-diffractive parts, based on safe assumptions on the double diffractive dissociation contribution.
Published: 1995
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4. A search for heavy leptons at HERA

Author: Peter Robmann, S. Aid, P. E. Reimer, J. Duboc, B. Stella, G. Müller, E. M. Hanlon, Carl R. Brune, M. Barth, L. R. West, V. Korbel, K. Rüter, C. Niebuhr, R. D. Appuhn, H. Krehbiel, A. Gellrich, F. Lamarche, G. G. Winter, B. Gonzalez-Pineiro, Hermann Kolanoski, P. Steffen, D. Clarke, John A Coughlan, Horst Oberlack, K. Rosenbauer, M. Vecko, P. R. Newman, J. Riedlberger, D. Mercer, G. Buschhorn, S. M. Robertson, R. L. Lander, S. Levonian, S. Masson, M. Colombo, D. Goldner, Y. Soloviev, Mikhail Danilov, F. Charles, M. F. Hess, G. Villet, Pierre Marage, H. U. Martyn, Matthias Klein, G. Lindström, K. Stephens, E. Peppel, R. Roosen, C. Gruber, H. P. Wellisch, Max Weber, J. Turnau, T. Jansen, M. Steenbock, Murrough Landon, A. E. Wright, J. Martyniak, G. Thompson, E. Malinovski, M. Kuhlen, A. Courau, B. Andrieu, T. Carli, K. Flamm, Christophe Royon, R. Nisius, Benno List, A. Buniatian, K. C. Hoeger, C. A. Meyer, G. Grindhammer, G. Rädel, D. Lüke, E. Wünsch, B. Fominykh, P. I. P. Kalmus, M. Hampel, B. Kuznik, R. Kaschowitz, W. Hildesheim, Roland Horisberger, A. Valkárová, V. Riech, I. Sheviakov, D. Wegener, W.J. Haynes, Ph. Huet, S. Riess, A. Gruber, I. W. Walker, A. Braemer, K. Rybicki, H. Itterbeck, P. Van Mechelen, M. Hapke, D. Düllmann, H. Henschel, D. Kant, Ch. Pichler, P. Hill, J. Bán, H. J. Behrend, J.C. Bizot, Emmanuelle Perez, Christoph Grab, Kerstin Borras, A. Semenov, M. Goldberg, Peter Schacht, G. C. Lopez, O. Dünger, M. Korn, Winston Ko, Dave Sankey, G. Siegmon, Jean-Arcady Meyer, R. Nahnhauer, E. Barrelet, U. Krüger, F. Botterweck, K. Daum, C. Pascaud, P. Loch, R. Gerhards, G. Weber, U. Straumann, David Cussans, F. Moreau, J. Hladký, J. Martens, Daniel Johnson, Vincent Hedberg, Frank Raupach, G. Knies, Armen Vartapetian, J. D. Dowell, R. J. Ellison, R. Marshall, Guenter Eckerlin, G. Cozzika, Dirk Krücker, L. N. Shtarkov, G. D. Patel, André Schöning, F. Kole, S. Schiek, F. Eisele, A. Jacholkowska, P. Verrecchia, J. R. Smith, S. Dagoret, T. Köhler, M. W. Krasny, F. Linsel, A. Wegener, L. Goerlich, A. Panitch, Martin Erdmann, S. D. Kolya, E. A. De Wolf, Ch. Berger, V. Schröder, R. Herma, Karlheinz Meier, J. Heatherington, J. Haack, Stefan Valkar, U. Obrock, Wolfgang Lange, E. Eisenhandler, Gregorio Bernardi, F. Niebergall, K. H. Hiller, Eckhart Fretwurst, I. O. Skillicorn, H. H. Kaufmann, H. B. Dreis, Eckhard Elsen, F. Brasse, R. C. W. Henderson, D. Newton, J. Gayler, R. Maraček, Anton Babaev, V. Efremenko, J. Ferencei, Steve McMahon, C. Thiebaux, S. Eichenberger, V I. Shekelyan, A. Walther, N. Wulff, J. Tutas, J. D. Burger, R. Prosi, L. Büngener, Hannes Jung, W. von Schlippe, T. Merz, U. Krüner-Marquis, P. Lanius, C. Vallée, E. Sanchez, W. Zimmermann, I. Tichomirov, K. Wacker, R. Steinberg, I. Herynek, J. Baehr, N. Magnussen, S. Mikocki, David Schmidt, J. Strachota, Markus Seidel, V. Tchernyshov, S. Tapprogge, W.D. Dau, N. Sahlmann, E. Evrard, P. Kasselmann, E. Schuhmann, B. Schwab, K. Gabathuler, A. Lebedev, Grzegorz Nowak, S. Egli, J. B. Dainton, C. Jacobsson, P. Biddulph, M. Fleischer, K. Johanssen, M. A. Jabiol, Pavel Murin, H. Grässler, M. Rietz, D. Haidt, H. Hufnagel, J. Feltesse, U. Bassler, M. Ibbotson, G. Bertrand-Coremans, R. Starosta, Daniel Pitzl, J. Kurzhöfer, V. Nagovizin, U. Seehausen, R. Eichler, F. Sefkow, P. Ribarics, G. Heinzelmann, C.D. Hilton, L. Criegee, B. Delcourt, M. Höppner, R. Felst, J.G. Contreras, J. P. Kubenka, U. Kathage, U. Stösslein, H. Meyer, S. Kermiche, Laurent Favart, S. Prell, S. K. Kotelnikov, L. Hajduk, J. Formánek, M. Gebauer, C. Dollfus, J. Garvey, R. Buchholz, C. Leverenz, David Milstead, V. Brisson, G. W. Noyes, A. M. Fomenko, P. A. Smirnov, O. Hamon, H. Küster, H. Shooshtari, F. Rouse, P. Baranov, J. V. Morris, G. Schmidt, Didier Lacour, G. Pope, Peter Schleper, Ulrich Goerlach, Dusan Bruncko, M. Jaffre, J. E. Olsson, Marc Besancon, M. Forbush, A. Schwind, B. Naroska, F. Ferrarotto, A.S. Belousov, Sergey Rusakov, P. Truöl, H. Genzel, W. Bartel, T. Greenshaw, C. Schmidt, J.P. Phillips, J. P. Sutton, P. Di Nezza, Rosario Martín, P. Van Esch, Stephen Maxfield, A. Lindner, J. Janoth, A. Rostovtsev, Claus Kleinwort, J. Stiewe, F. W. Büsser, Volker Blobel, P. Goritchev, C. Keuker, W. Braunschweig, K. Gamerdinger, A. B. Clegg, R. Rylko, Andrew Mehta, N. Gogitidze, R. Sell, D. Neyret, T. Mavroidis, S. Kazarian, U. Siewert, F. Zomer, A. M. Goodall, L. Del Buono, V. Andreev, M. Zimmer, Vincent Boudry, Jean-Francois Laporte, H. Ehrlichmann, Yves Sirois, J. Lipinski, G. Franke, Zhen Zhang, J. Žáček, J. Ebert, J. M. Foster, S. Mani, H. P. Beck, Stephen Burke, A. Usik, M. Savitsky, K. Zuber, J. Cvach, H. Bergstein, Th. Naumann, H. Duhm, E. Gabathuler, E. Deffur, P. Kostka, Ch. Ley, M. David, S. Reinshagen, A. Wagener, H. K. Nguyen, I. V. Gorelov, K. Müller, R. Grässler, Ch. Coutures, W. Struczinski, M. Flieser, J. Stier, M. Arpagaus, Y. Vazdik, M. Nyberg-Werther, T. R. Ebert, A. Fedotov, Günter Flügge, T. P. Yiou, C. Kiesling, A. De Roeck, A. J. Campbell, Richard E. Taylor, T. Ahmed, Th. Wolff, T. Kurča, S. Willard, I. R. Kenyon, H. Spitzer, M. Winde, R. Bernet, P. Uelkes, L. Johnson, H. E. Roloff, Leif J. Jönsson, H. Lohmander, and D. Feeken
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, High Energy Physics::Phenomenology, HERA, Massless particle, Nuclear physics, Particle decay, W and Z bosons, High Energy Physics::Experiment, Neutrino, Lepton
Abstract: A search for direct production of new leptons in the mass range from 10 GeV up to 225 GeV is presented by the H1 experiment at HERA. The data were obtained during 1993 and correspond to an integrated luminosity of 528 nb −1 . The search includes heavy lepton decays to final states e ( ν ) γ and e ( ν ) W , e ( ν ) Z with the subsequent decay of the W and Z bosons into jets or lepton pairs. No evidence was found for the production of new massive electrons or neutrinos in any of the decay channels. Rejection limits for excited electrons and neutrinos are derived.
Published: 1994
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5. Inclusive charged particle cross sections in photoproduction at HERA

Author: T. Jansen, T. Ahmed, Th. Wolff, I. Tichomirov, G. Rädel, L. Criegee, H. Hufnagel, S. Kermiche, J. Formánek, R. D. Appuhn, M. Hampel, Ph. Huet, C.D. Hilton, M. Gebauer, J. Garvey, Ch. Pichler, A. M. Fomenko, I. R. Kenyon, K. Stephens, E. Peppel, M. Gennis, R. C. W. Henderson, S. Levonian, E. Malinovski, M. Kuhlen, H. Spitzer, P. Baranov, J. Tutas, J. D. Burger, Peter Schleper, G. Grindhammer, C. Bourdarios, R. Prosi, A. Buniatian, Marc Besancon, A.S. Belousov, Sergey Rusakov, P. Truöl, G. Lindström, C. Gruber, M. Nyberg, J. Harjes, S. M. Robertson, Dusan Bruncko, K. Flamm, D. Wegener, W.J. Haynes, A. Mavroidis, P. Goritchev, S. K. Kotelnikov, L. Hajduk, W. Flauger, D. Pitzl, R. Roosen, Mikhail Danilov, D. Lewin, Grzegorz Nowak, J. Martyniak, C. Jacobsson, B. Fominykh, Emmanuel Monnier, Eckhart Fretwurst, Fabian Zomer, B. Naroska, F. Ferrarotto, K. Gamerdinger, T. Köhler, M. W. Krasny, H. Genzel, J. Martens, P. I. P. Kalmus, Michel Devel, J. M. Foster, V. Efremenko, Peter Loch, D. Kant, P. Dingus, W. von Schlippe, K. Johannsen, Kerstin Borras, Didier Lacour, T. Merz, R. J. Ellison, G. Cozzika, J. Hladký, A. Braemer, T. Greenshaw, G. Siegmon, J. Feltesse, J. Ebert, F. Eisele, S. Mikocki, C. A. Meyer, J.P. Phillips, W. Pilgram, Christophe Royon, A. Semenov, K. C. Hoeger, J. Žáček, Steve McMahon, U. Kathage, M. Savitsky, A. Gruber, Peter Schacht, G. C. Lopez, J. Haack, H. Bergstein, Th. Naumann, F. Moreau, J. D. Dowell, A. Jacholkowska, Rosario Martín, J. Ferencei, Leith Godfrey, W. Schmitz, V. Brisson, S. Aid, F. Charles, R. Taylor, P. Van Esch, H. Greif, P. Robmann, P. Fuhrmann, N. Magnussen, M. Goldberg, Max Klein, V. Boudry, H. Duhm, E. Vogel, Gregorio Bernardi, C. Niebuhr, Anton Babaev, M. Rudowicz, J. Marks, S. D. Kolya, S. Mani, L. N. Shtarkov, C. Thiebaux, J. Strachota, Hannes Jung, Mario David, Claus Kleinwort, F. Brasse, J. Turnau, J. Cvach, L. Goerlich, A. Drescher, I. Abt, T. P. Yiou, Stephen Burke, L. R. West, U. Bassler, I.F. Fensome, Winston Ko, E. Gabathuler, E. Deffur, D. Feeken, D. Goldner, P. Kostka, Leif J. Jönsson, Guenter Eckerlin, R. Vick, R. Nisius, André Schöning, C. Vallée, M. Steenbock, A. Lindner, S. J. Maxfiedl, Y. Soloviev, I. Sheviakov, A. Usik, E. Barrelet, A. M. Goodall, Volker Blobel, Ch. Berger, R. Eichler, C. Keuker, H. Lohmander, P. A. Smirnov, U. Krüger, E. Evrard, W. Hildesheim, P. R. Newman, B. Andrieu, A. Gellrich, V. Riech, Karlheinz Meier, P. Ribarics, V. Andreev, G. Villet, R. Felst, Pierre Marage, L. Büngener, D. Mercer, F. Lamarche, B. Schwab, M. Eberle, W. Lange, S. Willard, Roland Bernet, J. R. Smith, J. E. Olsson, W. Bartel, I. W. Walker, R. Herma, Hermann Kolanoski, S. Dagoret, Pavel Murin, H. Grässler, J. Moreels, K. Rybicki, D. Clarke, A. Courau, M. Ibbotson, M. Vecko, T. R. Ebert, John A Coughlan, M. Winde, A. Leuschner, Christoph Grab, L. Johnson, H. Ehrlichmann, E. Eisenhandler, M. Hapke, S. Masson, R. Langkau, Horst Oberlack, F. W. Büsser, W. Braunschweig, A. Fedotov, Günter Flügge, B. Delcourt, R. Sell, S. Kazarian, U. Siewert, A. B. Clegg, Andrew Mehta, N. Gogitidze, Laurent Favart, C. Dollfus, S. Reinshagen, U. Stösslein, V I. Shekelyan, R. Haydar, F. Kole, N. Sahlmann, C. Kiesling, Armen Vartapetian, E. Schuhmann, A. De Roeck, P. C. Bosetti, C. Leverenz, K. Wacker, R. Steinberg, B. Stella, A. Rostovtsev, M. Arpagaus, P. Biddulph, R. Ebbinghaus, M. Zimmer, J. Lipinski, Jean-Francois Laporte, Ulrich Goerlach, L. Urban, G. Franke, M. A. Jabiol, B. Kuznik, T. Kurča, R. L. Lander, M. Ruffer, K. Rosenbauer, M. Flieser, S. Orenstein, G. Bertrand-Coremans, H. Bärwolff, S. Eichenberger, Frank Raupach, J. Stier, R. Kaschowitz, Y. Vazdik, Y. Sirois, Jean-Arcady Meyer, M. Jaffré, H. Meyer, N. Wulff, A. Valkárová, P. Kasselmann, G. Thompson, A. Wegner, M. Colombo, M. Fleischer, S. Riess, H. Ziaeepour, W.D. Dau, J. B. Dainton, J. Kurzhöfer, V. Nagovizin, D. Düllmann, Hans Peter Beck, R. Gerhards, P. Hill, A. W. E. Dann, J. P. Kubenka, H. Henschel, J. Bán, Ch. Ley, U. Seehausen, H. J. Behrend, J.C. Bizot, D. Lüers, Murrough Landon, N. Huot, G. W. Noyes, P. Verrecchia, A. E. Wright, K. Müller, P. E. Reimer, H. Shooshtari, V. Schröder, J. Riedlberger, H. H. Kaufmann, Eckhard Elsen, D. Neyret, Nicolas Ellis, Alan Campbell, E. M. Hanlon, H. Itterbeck, S. Peters, H. K. Nguyen, I. V. Gorelov, O. Hamon, G. G. Winter, R. Grässler, Ch. Coutures, W. Struczinski, Vincent Hedberg, G. Knies, P. Steffen, I. O. Skillicorn, H. B. Dreis, H. P. Wellisch, T. Carli, V. Korbel, F. Linsel, J. Heatherington, D. Newton, P. Lanius, V. Tchernyshov, M. Korn, G. Weber, U. Straumann, H. U. Martyn, F. Ould-Saada, M. Höppner, S. Prell, S. A. Murray, J. Chyla, Martin Erdmann, U. Obrock, F. Niebergall, J. Duboc, C. Schmidt, J. P. Sutton, P. Di Nezza, U. Braun, K. Rauschnabel, E. Binder, H.T. Phillips, M. Schulz, J. Gayler, E. Sanchez, L. Del Buono, O. Dünger, R. Marshall, Dirk Krücker, H. Krehbiel, G. Buschhorn, I. Herynek, L.A. Womersley, A. Walther, W. Zimmermann, J. V. Morris, M. Forbush, A. Schwind, C. Pascaud, A. Lebedev, S. Egli, M. Rietz, D. Haidt, G. Heinzelmann, S. Valkar, H. Küster, D. Lüke, C. Zeitnitz, Dave Sankey, G. D. Patel, W. Scobel, D.P. Johnson, and David Schmidt
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Wire chamber, Particle physics, Elementary particle, HERA, Charged particle, Nuclear physics, Particle mass, Pseudorapidity, Transverse momentum, High Energy Physics::Experiment, Nuclear Experiment
Abstract: Cross sections are presented for the inclusive production of charged particles measured in electron-proton collisions at low Q 2 with the H1 detector at HERA. The transverse momentum distribution extends up to 8 GeV/ c . Its shape is found to be harder than that observed in p p collisions at comparable centre-of-mass energies √S γp ≈ √S p p ≈ 200 GeV , and also harder than in γp collisions at lower energies √ S γp ≈ 18 GeV. Results from quantum chromodynamics (QCD) calculations agree with the measured transverse momentum and pseudorapidity cross sections.
Published: 1994
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6. First measurement of the charged current cross section at HERA

Author: T. Ahmed, V. Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Bán, P. Baranov, E. Barrelet, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, H. Bergstein, G. Bernardi, R. Bernet, G. Bertrand-Coremans, M. Besançon, P. Biddulph, J.C. Bizot, V. Blobel, K. Borras, V. Boudry, A. Braemer, F. Brasse, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, G. Buschhorn, A.J. Campbell, T. Carli, F. Charles, D. Clarke, A.B. Clegg, M. Colombo, J.A. Coughlan, A. Courau, Ch. Coutures, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, M. Danilov, A.W.E. Dann, W.D. Dau, K. Daum, M. David, E. Deffur, B. Delcourt, L. Del Buono, A. De Roeck, E. De Wolf, C. Dollfus, J.D. Dowell, H.B. Dreis, J. Duboc, D. Düllmann, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, H. Ehrlichmann, S. Eichenberger, R. Eichler, F. Eisele, E. Eisenhandler, R.J. Ellison, E. Elsen, M. Erdmann, E. Evrard, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, W. Flauger, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, B. Fominykh, M. Forbush, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gamerdinger, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, A.M. Goodall, I. Gorelov, P. Goritchev, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, G. Grindhammer, C. Gruber, J. Haack, D. Haidt, L. Hajduk, O. Hamon, M. Hampel, E.M. Hanlon, M. Hapke, W.J. Haynes, J. Heatherington, V. Hedberg, G. Heinzelmann, R.C.W. Henderson, H. Henschel, R. Herma, I. Herynek, W. Hildesheim, P. Hill, C.D. Hilton, J. Hladký, K.C. Hoeger, M. Höppner, Ph. Huet, H. Hufnagel, M. Ibbotson, H. Itterbeck, M.-A. Jabiol, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Jönsson, K. Johannsen, D.P. Johnson, L. Johnson, H. Jung, P.I.P. Kalmus, D. Kant, S. Kazarian, R. Kaschowitz, P. Kasselmann, U. Kathage, H.H. Kaufmann, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, W. Ko, T. Köhler, H. Kolanoski, F. Kole, S.D. Kolya, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, M.W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, M. Krüner-Marquis, J.P. Kubenka, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, B. Kuznik, D. Lacour, F. Lamarche, R. Lander, M.P.J. Landon, W. Lange, P. Lanius, J.F. Laporte, A. Lebedev, C. Leverenz, S. Levonian, Ch. Ley, A. Lindner, G. Lindström, F. Linsel, J. Lipinski, P. Loch, H. Lohmander, G.C. Lopez, D. Lüers, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, P. Marage, R. Marshall, J. Martens, R. Martin, H.-U. Martyn, J. Martyniak, S. Masson, A. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, D. Mercer, T. Merz, C.A. Meyer, H. Meyer, J. Meyer, S. Mikocki, V. Milone, D. Milstead, F. Moreau, J.V. Morris, G. Müller, P. Murín, V. Nagovizin, B. Naroska, Th. Naumann, G. Nawrath, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, F. Niebergall, C. Niebuhr, R. Nisius, G. Nowak, G.W. Noyes, M. Nyberg-Werther, H. Oberlack, U. Obrock, J.E. Olsson, A. Panitch, C. Pascaud, G.D. Patel, E. Peppel, E. Perez, J.P. Phillips, Ch. Pichler, D. Pitzl, G. Pope, S. Prell, R. Prosi, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, P. Ribarics, V. Riech, J. Riedlberger, S. Riess, M. Rietz, S.M. Robertson, P. Robmann, R. Roosen, K. Rosenbauer, A. Rostovtsev, C. Royon, K. Rüter, M. Ruffer, S. Rusakov, K. Rybicki, N. Sahlmann, E. Sanchez, D.P.C. Sankey, M. Savitsky, P. Schacht, P. Schleper, W. von Schlippe, C. Schmidt, D. Schmidt, A. Schöning, V. Schröder, M. Schulz, B. Schwab, A. Schwind, U. Seehausen, F. Sefkow, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, H. Shooshtari, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, J.R. Smith, Y. Soloviev, H. Spitzer, P. Staroba, M. Steenbock, P. Steffen, R. Steinberg, B. Stella, K. Stephens, J. Stier, J. Stiewe, U. Stösslein, J. Strachota, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, R.E. Taylor, V. Tchernyshov, C. Thiebaux, G. Thompson, I. Tichomirov, P. Truöl, J. Turnau, J. Tutas, A. Usik, S. Valkar, A. Valkarova, C. Vallée, P. Van Esch, P. Van Mechelen, A. Vartapetian, Y. Vazdik, M. Vecko, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, I.W. Walker, A. Walther, G. Weber, M. Weber, D. Wegener, A. Wegner, H.P. Wellisch, L.R. West, S. Willard, M. Winde, G.-G. Winter, Th. Wolff, A.E. Wright, E. Wünsch, N. Wulff, T.P. Yiou, J. Žáček, Z. Zhang, M. Zimmer, W. Zimmermann, F. Zomer, and K. Zuber
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, Propagator, Elementary particle, HERA, Nuclear physics, Cross section (physics), Transverse plane, High Energy Physics::Experiment, Nuclear Experiment, Charged current
Abstract: The cross section of the charged current process e − p → v e + hadrons is measured at HERA for transverse momenta of the hadron system larger than 25 GeV. The size of the cross section exhibits the W propagator.
Published: 1994
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7. Scaling violations of the proton structure function F2 at small x

Author: F. Kole, B. Schwab, Petr Zavada, Pavel Murin, H. Grässler, M. Ibbotson, M. Schulz, D. Lüers, F. Charles, R. Taylor, N. Magnussen, Steve McMahon, Armen Vartapetian, Th. Wolff, Pavel Staroba, P. Verrecchia, H. Spitzer, Richard Nisius, Michel Devel, M. Colombo, E. Evrard, W.D. Dau, J. B. Dainton, Claire Bourdarios, Laurent Favart, C. Dollfus, J. Turnau, M. Steenbock, B. Andrieu, N. Sahlmann, V. Korbel, J. E. Olsson, W. Bartel, Stephen Maxfield, Kerstin Borras, C. Pascaud, V. Schröder, W. von Schlippe, H. H. Kaufmann, Eckhard Elsen, R. Marshall, Dirk Krücker, I. Tichomirov, Murrough Landon, A. E. Wright, G. Lindström, B. Delcourt, G. Bertrand-Coremans, J. Feltesse, Ulrich Goerlach, R. Kaschowitz, R. Ebbinghaus, A. B. Clegg, N. Gogitidze, F. W. Büsser, W. Braunschweig, K. C. Hoeger, Leif J. Jönsson, H. Hufnagel, Alexandre Lebedev, H. Lohmander, L. Criegee, A. Semenov, J. Riedlberger, M. Nyberg, S. Egli, M. Rietz, T. Merz, S. Kasarian, U. Stösslein, C. Leverenz, J. Žáček, Max Klein, L.A. Womersley, J. Formánek, M. A. Jabiol, V. Riech, R. Sell, A. Valkárová, S. Orenstein, J. Harjes, S. M. Robertson, S. Riess, G. Heinzelmann, Mario David, S. Kermiche, E. Barrelet, Tancredi Carli, I. R. Kenyon, S. Reinshagen, A. Walther, C.D. Hilton, Fabian Zomer, M. Hapke, F. Linsel, P. A. Smirnov, A. Lindner, L. N. Shtarkov, U. Bassler, Ch. Berger, Karlheinz Meier, J. Ebert, U. Siewert, F. Brasse, W. Zimmermann, Hans Peter Beck, H. Itterbeck, S. Peters, M. Zimmer, E. Malinovski, M. Kuhlen, Vincent Boudry, A. Buniatian, Mikhail Danilov, J. Heatherington, R. C. W. Henderson, I. F. Fensome, Volker Blobel, K. Stephens, E. Peppel, D. Newton, D. Lewin, L. Büngener, V. Milone, S. Eichenberger, G. Cozzika, D. Wegener, W.J. Haynes, Jean-Francois Laporte, Jean-Arcady Meyer, R. Eichler, C. Keuker, R. Roosen, H. Shooshtari, G. Grindhammer, J. Martyniak, R. Gerhards, A. Drescher, O. Hamon, M. Fleischer, Ch. Ley, Dave Sankey, D. Handschuh, I. Herynek, P. Lanius, Emmanuel Monnier, S. A. Murray, S. Levonian, H. Krehbiel, T. Köhler, M. W. Krasny, P. E. Reimer, B. Fominykh, E. M. Hanlon, V. Tchernyshov, Stefan Valkar, M. Arpagaus, J. Duboc, B. Stella, H. T. Phillips, H. Greif, P. Hill, J. Bán, P. Ribarics, C. Niebuhr, R. Felst, G. D. Patel, H. Meyer, Paul Newman, K. Flamm, A. Mavroidis, V. Efremenko, Hannes Jung, G. Buschhorn, Daniel Pitzl, G. G. Winter, S. Mani, R. M. Martin, J. Tutas, J. D. Burger, M. Rudowicz, M. Eberle, L. Smolik, U. Seehausen, Grzegorz Nowak, Eckhart Fretwurst, M. Korn, P. I. P. Kalmus, David Schmidt, Vincent Hedberg, G. Knies, S. Mikocki, P. Steffen, C. Vallée, P. Biddulph, I. Abt, Stephen Burke, Martin Erdmann, R. Prosi, U. Obrock, F. Niebergall, Nicolas Ellis, G. Weber, U. Straumann, J. V. Morris, H. P. Wellisch, A. Wegner, T. Ahmed, K. Johannsen, J. R. Smith, R. Herma, Christophe Royon, A. Usik, R. D. Appuhn, E. Eisenhandler, Y. Soloviev, T. Kurca, S. K. Kotelnikov, L. Hajduk, M. Jaffré, H. K. Nguyen, I. V. Gorelov, K. Müller, P. Dingus, A. M. Goodall, M. Forbush, P. Baranov, H. Ziaeepour, R. Grässler, Ch. Coutures, W. Struczinski, Peter Schacht, G. C. Lopez, C. A. Meyer, J. Kurzhöfer, A. Schwind, V. Nagovizin, M. Vecko, Peter Schleper, J. Haack, A. W. E. Dann, C. Zeitnitz, Rudolf Langkau, H. Küster, W. Schmitz, A. Gellrich, V. Andreev, M. Rüffer, J. M. Foster, R. J. Ellison, F. Lamarche, M. Savitsky, I. O. Skillicorn, H. B. Dreis, I. W. Walker, K. Rybicki, J. P. Kubenka, Marc Besancon, P. Fuhrmann, A.S. Belousov, D. Düllmann, H. U. Martyn, Sergey Rusakov, P. Truöl, Peter Loch, Winston Ko, Didier Lacour, Guenter Eckerlin, Daniel Johnson, E. Vogel, G. W. Noyes, M. Gennis, H. Henschel, H. J. Behrend, J.C. Bizot, M. Goldberg, Hermann Kolanoski, D. Clarke, John A Coughlan, W. Pilgram, J. Cvach, Gregorio Bernardi, Anton Babaev, C. Thiebaux, Horst Oberlack, A. Leuschner, Christoph Grab, L. Goerlich, R. Vick, André Schöning, I. Sheviakov, G. Villet, Pierre Marage, Yves Sirois, Frank Raupach, J. Strachota, U. Krüger, A. Courau, Roland Bernet, J. Lipinski, K. Gamerdinger, S. Dagoret, J. Garvey, J. Hladký, F. Eisele, G. Franke, V I. Shekelyan, A. M. Fomenko, J. D. Dowell, R. Haydar, P. C. Bosetti, G. Siegmon, Wolfgang Scobel, Ankita Mehta, N. Wulff, K. Wacker, R. Steinberg, E. J. Sanchez, N. Huot, P. Goritchev, Dusan Bruncko, P. Kasselmann, B. Naroska, F. Ferrarotto, H. Genzel, T. Greenshaw, D. Neyret, J.P. Phillips, D. Feeken, W. Hildesheim, R. L. Lander, J. Ferencei, H. Bärwolff, P. Van Esch, J. Marks, A. Rostovtsev, Claus Kleinwort, F. Moreau, S. Willard, A. Jacholkowska, M. Winde, S. D. Kolya, L. Johnson, T. Jansen, G. Rädel, B. Kuznik, Ph. Huet, Ch. Pichler, C. Gruber, W. Flauger, K. Rauschnabel, Wolfgang Lange, E. Binder, J. Gayler, G. Thompson, S. Prell, C. Jacobsson, U. Kathage, C. Schmidt, J. P. Sutton, U. Braun, H. Bergstein, Peter Robmann, Th. Naumann, L. Del Buono, A. Bischoff, H. Duhm, E. Gabathuler, E. Deffur, O. Dünger, P. Kostka, J. Moreels, T. R. Ebert, A. Fedotov, Günter Flügge, T. P. Yiou, C. Kiesling, A. De Roeck, A. J. Campbell, Farid Ould-Saada, Leith Godfrey, L. Urban, M. Flieser, D. Mercer, J. Stier, Y. Vazdik, L.R. West, S. Masson, J. Martens, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and H1
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Distribution function, Proton, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Range (statistics), Perturbative QCD, HERA, Event (particle physics), Scaling, Gluon
Abstract: An analysis is presented of scaling violations of the proton structure function F 2 ( x , Q 2 ) measured with the H1 detector at HERA in the range of Bjorken x values between x = 3 × 10 −4 and 10 −2 for four-momentum transfers Q > 2 larger than 8.7 GeV 2 . The structure function F 2 ( x , Q 2 ) is observed to rise linearly with ln Q 2 . Under the assumption that the observed scaling violations at small x ⩽ 0.01 are described correctly by perturbative QCD, an estimate is obtained of the gluon distribution function G ( x , Q 0 2 ) at Q 2 2 = 20 GeV 2 .
Published: 1994
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8. Measurement of the proton structure function F2 (x, Q2) in the low-x region at HERA

Author: Steve McMahon, C. A. Meyer, G. Siegmon, A. Drescher, P. Fuhrmann, F. Moreau, J. Hladký, J. D. Dowell, A. Jacholkowska, A. Lebedev, S. Egli, G. Villet, L. Goerlich, S. D. Kolya, M. Rietz, D. Haidt, Pierre Marage, G. Heinzelmann, A. Courau, H. Küster, A. Usik, N. Magnussen, R. C. W. Henderson, N. Sahlmann, P. Biddulph, M. Colombo, J. V. Morris, Frank Raupach, R. Ebbinghaus, M. A. Jabiol, A. E. Wright, J. Tutas, J. D. Burger, N. Wulff, R. Prosi, P. Kasselmann, D. P. C. Sankey, U. Bassler, Daniel Pitzl, M. Forbush, V. Milone, A. Schwind, M. Jaffre, J. E. Olsson, W. Bartel, H. Itterbeck, S. Peters, R. Felst, S. K. Kotelnikov, L. Hajduk, M. Eberle, F. W. Büsser, W. Braunschweig, R. Sell, C. Zeitnitz, V. Korbel, K. C. Hoeger, T. Jansen, U. Siewert, M. Zimmer, Vincent Boudry, Jean-Francois Laporte, G. D. Patel, H. Meyer, Peter Loch, W. Scobel, Vincent Hedberg, G. Rädel, G. Knies, B. Kuznik, Ph. Huet, W. Pilgram, D. Lüers, Ch. Pichler, D.P. Johnson, David Schmidt, J. Haack, I. O. Skillicorn, H. B. Dreis, Ch. Ley, Peter Schacht, G. C. Lopez, W. Schmitz, V. Riech, M. Hapke, R. Bernet, Pavel Staroba, Kerstin Borras, E. Vogel, Gregorio Bernardi, Anton Babaev, G. Cozzika, F. Eisele, A. Buniatian, D. Wegener, W. von Schlippe, A. Semenov, T. Merz, J. Turnau, J. Strachota, W.J. Haynes, P. Verrecchia, I.F. Fensome, P. Goritchev, Stefan Valkar, M. Steenbock, A. Lindner, Volker Blobel, C. Keuker, R. Roosen, Emmanuel Monnier, V. Schröder, S. Kasarian, K. Gamerdinger, T. Köhler, D. Neyret, S. Levonian, K. Rauschnabel, Wolfgang Lange, B. Andrieu, Hannes Jung, K. Johannsen, B. Schwab, C. Vallée, E. Malinovski, Pavel Murin, D. Mercer, H. Grässler, J. Riedlberger, H. K. Nguyen, F. Brasse, E. Binder, M. Ibbotson, H. H. Kaufmann, Eckhard Elsen, Leif J. Jönsson, M. Nyberg, J. Harjes, Christophe Royon, P. Baranov, Laurent Favart, C. Dollfus, I. V. Gorelov, K. Müller, J. Gayler, Jean-Arcady Meyer, V. Efremenko, Mario David, F. Linsel, Peter Schleper, Ulrich Goerlach, R. Grässler, Ch. Coutures, W. Struczinski, J. Heatherington, J. M. Foster, R. Kaschowitz, S. M. Robertson, R. Gerhards, P. Závada, E. Evrard, M. Savitsky, E. Sanchez, S. Riess, M. Kuhlen, H. Lohmander, G. Grindhammer, S. Mikocki, K. Flamm, A. Mavroidis, D. Newton, L. N. Shtarkov, Leith Godfrey, Marc Besancon, J. Cvach, F. Zomer, A. M. Goodall, L. Del Buono, Winston Ko, B. Delcourt, A.S. Belousov, Sergey Rusakov, U. Stösslein, P. Lanius, C. Pascaud, I. W. Walker, K. Rybicki, J. Duboc, B. Stella, S. Kermiche, P. I. P. Kalmus, P. Hill, J. Bán, P. Truöl, Mikhail Danilov, Peter Robmann, D. Lewin, H. Greif, L. Criegee, Stephen Maxfield, C. Leverenz, V. Tchernyshov, A. Leuschner, Christoph Grab, O. Hamon, Nicolas Ellis, Guenter Eckerlin, J. Martyniak, E. Barrelet, R. Vick, M. Vecko, A. B. Clegg, Andrew Mehta, T. Ahmed, J. Formánek, A. Bischoff, Th. Wolff, M. Rudowicz, Yves Sirois, H. Shooshtari, I. R. Kenyon, I. Abt, M. Korn, J. Lipinski, R. Nisius, B. Fominykh, G. Franke, J. Žáček, S. Masson, R. Langkau, M. Ruffer, Armen Vartapetian, G. Thompson, S. Orenstein, G. Weber, U. Straumann, H. Spitzer, Ch. Berger, O. Dünger, J. Ebert, R. J. Ellison, L.A. Womersley, R. L. Lander, H. Bärwolff, A. Gellrich, F. Lamarche, S. Mani, R. D. Appuhn, D. Düllmann, J. R. Smith, H. P. Beck, Eckhart Fretwurst, S. Eichenberger, H. Henschel, Stephen Burke, R. Herma, I. Tichomirov, E. Eisenhandler, L. Büngener, J. Martens, H. J. Behrend, J.C. Bizot, M. Goldberg, M. Gennis, M. Fleischer, Hermann Kolanoski, D. Clarke, Michel Devel, John A Coughlan, K. Meier, Horst Oberlack, A. Walther, S. Prell, F. Kole, G. Bertrand-Coremans, G. Lindström, C. Gruber, W. Flauger, L. Smolik, U. Seehausen, H. Hufnagel, W. Zimmermann, I. Herynek, J. Garvey, A. M. Fomenko, A. Wegner, C.D. Hilton, P. Kotska, Grzegorz Nowak, C. Jacobsson, C. Schmidt, J. P. Sutton, U. Braun, N. Huot, H. Ziaeepour, H.T. Phillips, M. Schulz, J. Kurzhöfer, V. Nagovizin, W.D. Dau, A. W. E. Dann, J. B. Dainton, R. Eichler, M. W. Krasny, Claire Bourdarios, R. Marshall, Dirk Krücker, U. Kathage, D. Handschuh, K. Stephens, E. Peppel, H. Krehbiel, V. Brisson, J. P. Kubenka, C. Thiebaux, G. Buschhorn, G. W. Noyes, P. Dingus, J. Feltesse, Max Klein, P. A. Smirnov, F. Charles, I. Sheviakov, U. Krüger, J. Stier, J. Marks, S. Dagoret, Y. Vazdik, H. Bergstein, Th. Naumann, Vladimir Andreev, H. U. Martyn, H. Duhm, V I. Shekelyan, R. Haydar, P. C. Bosetti, E. Gabathuler, E. Deffur, K. Wacker, P. Ribarics, R. Steinberg, Y. Soloviev, J. Moreels, T. R. Ebert, Dusan Bruncko, P. E. Reimer, Alan Campbell, E. M. Hanlon, G. G. Winter, A. Fedotov, Günter Flügge, T. P. Yiou, P. Steffen, B. Naroska, F. Ferrarotto, H. P. Wellisch, C. Kiesling, A. De Roeck, T. Carli, Richard E. Taylor, F. Ould-Saada, H. Genzel, L. Urban, T. Kurča, T. Greenshaw, J.P. Phillips, Rosario Martín, J. Ferencei, P. Van Esch, A. Rostovtsev, Claus Kleinwort, S. Reinshagen, M. Arpagaus, W. Hildesheim, S. Willard, M. Winde, L. Johnson, D. Feeken, A. Valkarova, S. A. Murray, Martin Erdmann, U. Obrock, F. Niebergall, and M. P. J. Landon
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Range (particle radiation), Luminosity (scattering theory), Neutral current, Proton, Detector, Elementary particle, HERA, Atomic physics, Deep inelastic scattering
Abstract: A measurement of the proton structure function F2 (x, Q2) is presented with about 1000 neutral current deep inelastic scattering events for Bjorken x in the range x ⋍ 10−2 – 10−4 and Q2 > 5 GeV2. The measurement is based on an integrated luminosity of 22.5 nb−1 recorded by the H1 detector in the first year of HERA operation. The structure function F2 (x, Q2) shows a significant rise with decreasing x.
Published: 1993
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9. Measurement of inclusive jet cross sections in photoproduction at HERA

Author: J. Duboc, B. Stella, Kerstin Borras, A. Lebedev, A. Semenov, M. Rietz, C. Vallée, M. Colombo, R. D. Appuhn, Vladimir Andreev, H. Greif, M. Gennis, N. Magnussen, G. Lindström, C. Gruber, W. Flauger, H. Bergstein, S. D. Kolya, D. Haidt, Th. Naumann, F. Brasse, R. C. W. Henderson, M. Rudowicz, N. Sahlmann, Murrough Landon, A. E. Wright, H. Duhm, J-P. Meyer, P. Biddulph, R. Ebbinghaus, W. von Schlippe, T. Merz, M. Ibbotson, E. Deffur, K. C. Hoeger, G. Heinzelmann, M. A. Jabiol, J. Tutas, J. D. Burger, F. Ould-Saada, R. Prosi, F. Zomer, A. M. Goodall, R. Bernet, P. Kostka, A. Buniatian, M. Jaffre, P. Ribarics, D. Wegener, W.J. Haynes, U. Bassler, M. Fleischer, Leith Godfrey, C. Kiesling, H. Itterbeck, S. Peters, V. Riech, Armen Vartapetian, J. E. Olsson, W. Bartel, E. Malinovski, M. Kuhlen, Y. Soloviev, L. Del Buono, V. Milone, S. Kasarian, S. A. Murray, H. Küster, J. Feltesse, M. Hapke, K. Rauschnabel, Wolfgang Lange, Leif J. Jönsson, R. Roosen, Emmanuel Monnier, T. Köhler, M. W. Krasny, Mario David, E. Binder, J. V. Morris, V. Efremenko, H. Lohmander, G. Siegmon, Martin Erdmann, R. Felst, U. Obrock, Grzegorz Nowak, C. Jacobsson, M. Eberle, M. Korn, L.A. Womersley, R. Nisius, F. W. Büsser, M. Arpagaus, W. Braunschweig, F. Niebergall, V. Korbel, J. Stier, K. Rybicki, Vincent Hedberg, G. Knies, L. Smolik, U. Seehausen, K. Johannsen, S. Mikocki, M. Forbush, Max Klein, R. L. Lander, R. J. Ellison, J. Marks, R. Gerhards, J. M. Foster, H. Bärwolff, Y. Vazdik, J. Riedlberger, A. Schwind, R. Sell, E. Sanchez, G. Weber, U. Straumann, M. Nyberg, T. Ahmed, Th. Wolff, P. E. Reimer, Christophe Royon, F. Moreau, L. N. Shtarkov, J. D. Dowell, C. A. Meyer, M. Vecko, J. R. Smith, I. R. Kenyon, Alan Campbell, J. Harjes, J. Moreels, J. Haack, E. M. Hanlon, S. M. Robertson, R. Herma, W. Hildesheim, H. U. Martyn, U. Siewert, I. O. Skillicorn, T. R. Ebert, A. Walther, A. Jacholkowska, H. Spitzer, D. Mercer, G. G. Winter, M. Savitsky, H. B. Dreis, P. A. Smirnov, K. Meier, J. Turnau, A. Fedotov, B. Naroska, Winston Ko, Yves Sirois, P. Fuhrmann, G. Grindhammer, F. Linsel, Günter Flügge, T. P. Yiou, M. Zimmer, S. Willard, P. Baranov, C. Zeitnitz, S. Eichenberger, Dave Sankey, P. Steffen, J. Martens, C. Pascaud, Tim Greenshaw, Jean-Francois Laporte, W. Zimmermann, M. Steenbock, A. De Roeck, Richard E. Taylor, A. Valkarova, J. Heatherington, F. Kole, Guenter Eckerlin, L. Goerlich, Peter Robmann, Peter Schleper, Michel Devel, S. Kermiche, L. Urban, S. Masson, L. Criegee, H. Henschel, T. Kurča, J. Lipinski, R. Vick, D. Newton, G. D. Patel, G. Franke, B. Andrieu, H. Meyer, W. Scobel, A. Bischoff, D.P. Johnson, A. Gellrich, H. P. Wellisch, H. Shooshtari, M. Winde, S. Rusakov, J. Formánek, L. Johnson, F. Lamarche, R. Kaschowitz, J. Cvach, P. Lanius, T. Carli, R. Langkau, T. Jansen, P. Goritchev, V. Tchernyshov, S. Riess, S. Egli, Frank Raupach, Marc Besancon, W.D. Dau, U. Kathage, J. B. Dainton, O. Dünger, K. Gamerdinger, A.S. Belousov, P. Hill, Hermann Kolanoski, D. Clarke, G. Rädel, H.T. Phillips, M. Schulz, B. Kuznik, J. Bán, John A Coughlan, D. Neyret, Claire Bourdarios, J.C. Phillips, K. Stephens, E. Peppel, J. Gayler, P. Truöl, Horst Oberlack, N. Wulff, J. Garvey, Mikhail Danilov, I. Abt, E. Gabathuler, Nicolas Ellis, Ph. Huet, D. Lewin, Stephen Maxfield, Ch. Pichler, J. Žáček, A. M. Fomenko, I. W. Walker, E. Eisenhandler, P. Kasselmann, R. Marshall, S. Prell, A. Leuschner, Christoph Grab, Dirk Krücker, A. B. Clegg, Andrew Mehta, D. Handschuh, H. Krehbiel, J. Martyniak, D. Feeken, G. Buschhorn, S. Levonian, S. Mani, B. Fominykh, N. Huot, D. Lüers, E. Barrelet, H. P. Beck, Stephen Burke, P. Dingus, Pavel Staroba, P. Verrecchia, M. Ruffer, V. Schröder, S. Orenstein, Ch. Berger, H. H. Kaufmann, K. Flamm, Eckhart Fretwurst, A. Mavroidis, L. Büngener, I. Tichomirov, C. Schmidt, J. P. Sutton, U. Braun, J. Ebert, P. I. P. Kalmus, I. Herynek, H. Hufnagel, A. Usik, Ch. Ley, C.D. Hilton, H. K. Nguyen, I. V. Gorelov, K. Müller, R. Grässler, Ch. Coutures, W. Struczinski, D. Schmidt, Peter Schacht, G. C. Lopez, W. Schmitz, E. Vogel, Gregorio Bernardi, V. Boudry, Anton Babaev, C. Thiebaux, J. Strachota, I.F. Fensome, A. Lindner, Volker Blobel, C. Keuker, Petr Zavada, Pavel Murin, V. Brisson, H. Grässler, Laurent Favart, C. Dollfus, F. Charles, I. Sheviakov, Ulrich Goerlach, U. Krüger, S. Dagoret, G. Cozzika, F. Eisele, J. Hladký, Stefan Valkar, Hannes Jung, V I. Shekelyan, R. Haydar, P. C. Bosetti, K. Wacker, R. Steinberg, E. Evrard, Dusan Bruncko, F. Ferrarotto, B. Delcourt, H. Genzel, U. Stösslein, C. Leverenz, O. Hamon, Rosario Martín, J. Ferencei, P. Van Esch, E. Elsen, A. Rostovtsev, Claus Kleinwort, G. Bertrand-Coremans, G. Thompson, A. Wegner, H. Ziaeepour, J. Kurzhöfer, V. Nagovizin, A. W. E. Dann, D. Düllmann, R. Eichler, J. P. Kubenka, G. W. Noyes, H. J. Behrend, J.C. Bizot, M. Goldberg, Steve McMahon, A. Drescher, G. Villet, Pierre Marage, A. Courau, Daniel Pitzl, S. K. Kotelnikov, L. Hajduk, Peter Loch, W. Pilgram, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Damoiseaux, Magali
Subjects: Nuclear and High Energy Physics, Particle physics, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, FOS: Physical sciences, Elementary particle, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Perpendicular, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, Quantum chromodynamics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Detector, Perturbative QCD, HERA, Transverse plane, Pseudorapidity, High Energy Physics::Experiment, Underlying event
Abstract: Inclusive jet cross sections are measured in photoproduction at HERA using the H1 detector. The data sample of e+ p -> e+ + jet + X events in the kinematic range of photon virtualities Q^2 < 1 GeV^2 and photon-proton centre-of-mass energies 95 < W_gammap < 285 GeV represents an integrated luminosity of 24.1 pb^-1. Jets are defined using the inclusive k_T algorithm. Single- and multi-differential cross sections are measured as functions of jet transverse energy E_T^jet and pseudorapidity ��^jet in the domain 5 < E_T^jet < 75 GeV and -1 < ��^jet < 2.5. The cross sections are found to be in good agreement with next-to-leading order perturbative QCD calculations corrected for fragmentation and underlying event effects. The cross section differential in E_T^jet, which varies by six orders of magnitude over the measured range, is compared with similar distributions from p pbar colliders at equal and higher energies., 34 pages, 9 figures and 7 tables
Published: 1993
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10. A search for leptoquarks, leptogluons and excited leptons in H1 at HERA

Author: C. Jacobsson, Leith Godfrey, M. Savitsky, Th. Wolff, G. Villet, Pierre Marage, I. R. Kenyon, E. Malinovski, M. Kuhlen, E. Evrard, H. Spitzer, G. Siegmon, C. Zeitnitz, Dave Sankey, G. D. Patel, H. Meyer, W. Scobel, L. Smolik, U. Seehausen, D.P. Johnson, R. Nisius, M. W. Krasny, J. Cvach, A. Courau, M. Colombo, Murrough Landon, J. V. Morris, Michel Devel, U. Kathage, J. Riedlberger, M. Vecko, T. Ahmed, M. Jaffre, W. Ko, J. E. Olsson, W. Bartel, C. A. Meyer, H. U. Martyn, B. Delcourt, M. Forbush, A. Schwind, M. Nyberg, J. Harjes, A. E. Wright, F. Moreau, J. Hladký, J. D. Dowell, S. M. Robertson, Kerstin Borras, U. Stösslein, J. Garvey, A. Semenov, P. Baranov, R. J. Ellison, R. Bernet, A. Jacholkowska, F. W. Büsser, P. Goritchev, E. Gabathuler, C. Leverenz, A. M. Fomenko, W. Braunschweig, P. Fuhrmann, A. Lebedev, F. Charles, M. Rietz, I. Sheviakov, D. Haidt, Peter Schleper, O. Hamon, K. Gamerdinger, R. Sell, R. Herma, I. O. Skillicorn, S. J. McMahon, D. Neyret, L. Goerlich, Andrew Mehta, J. Moreels, G. Heinzelmann, F. Brasse, Leif J. Jönsson, D. Handschuh, H. Itterbeck, S. Peters, U. Krüger, M. Fleischer, U. Siewert, J-P. Meyer, H. Küster, S. Masson, U. Bassler, G. Cozzika, Marc Besancon, E. Barrelet, N. Huot, S. A. Murray, M. Zimmer, W. von Schlippe, A.S. Belousov, F. Eisele, T. Merz, Daniel Pitzl, J. Žáček, S. Dagoret, H. Lohmander, V. Milone, H. Krehbiel, K. Johannsen, J.P. Phillips, Stefan Valkar, M. Ibbotson, T. Jansen, P. Truöl, I. Tichomirov, Christophe Royon, M. Ruffer, Ch. Berger, S. Orenstein, T. R. Ebert, F. Raupach, P. I. P. Kalmus, S. Kasarian, J. Ferencei, V I. Shekelyan, R. Haydar, P. C. Bosetti, G. Rädel, R. Felst, S. K. Kotelnikov, L. Hajduk, C. Trenkel, Hannes Jung, D. Gillespie, B. Kuznik, L. Büngener, Armen Vartapetian, C. Vallée, M. Eberle, Mario David, K. Wacker, R. Steinberg, P. Závada, Ph. Huet, B. Naroska, G. Buschborn, J. M. Foster, Vincent Hedberg, G. Knies, H. Hufnagel, J. Ebert, Hermann Kolanoski, I. Herynek, D. Clarke, M. Korn, R. D. Appuhn, Ch. Pichler, S. Mani, Pavel Murin, D. Mercer, V. Brisson, John A Coughlan, A. Fedotov, G. Nowak, T. P. Yiou, C. Pascaud, H. Grässler, Guenter Eckerlin, R. Vick, Peter Loch, Dusan Bruncko, Martin Erdmann, H. P. Beck, U. Obrock, Stephen Burke, H. Shooshtari, R. D. Martin, F. Niebergall, V. Korbel, N. Wulff, D. Lüers, J. Haack, F. Ferrarotto, W. Pilgram, H. Genzel, M. Gennis, S. Kermiche, Ch. Ley, J. Tutas, J. D. Burger, P. Kasselmann, G. Thompson, R. Prosi, J. Duboc, B. Stella, N. Magnussen, H. Greif, C.D. Hilton, H. B. Dreis, N. Sahlmann, Pavel Staroba, G. Lindström, C. Gruber, S. J. Maxfield, F. Zomer, A. M. Goodall, M. Rudowicz, W. Flauger, R. Langkau, D. Düllmann, P. Biddulph, L. Del Buono, R. Ebbinghaus, A. De Roeck, P. Van Esch, E. Elsen, I. Abt, Richard E. Taylor, H. J. Behrend, J.C. Bizot, A. Rostovtsev, Claus Kleinwort, M. Goldberg, M. A. Jabiol, S. Eichenberger, G. Bertrand-Coremans, H. K. Nguyen, I. V. Gorelov, K. Müller, Mikhail Danilov, D. Lewin, V. Schröder, A. Drescher, R. Grässler, Ch. Coutures, W. Struczinski, L. Urban, Laurent Favart, H. Henschel, A. Wegner, H. Oberlack, Yves Sirois, A. Valkarova, H. H. Kaufmann, S. Egli, G. Weber, T. Kurča, H. Bärwolff, H. Ziaeepour, J. Kurzhöfer, U. Straumann, V. Nagovizin, A. W. E. Dann, C. Dollfus, L. Criegee, S. Levonian, R. Eichler, J. Martyniak, J. P. Kubenka, A. Usik, J. Lipinski, G. Franke, C. Thiebaux, A. B. Clegg, Vladimir Andreev, B. Fominykh, L.A. Womersley, G. W. Noyes, G. Flügge, I. W. Walker, K. Flamm, P. Schacht, R. Kaschowitz, A. Leuschner, Christoph Grab, A. Mavroidis, S. Rusakov, J. Formánek, A. Walther, J. Stier, Ulrich Goerlach, J. Marks, Y. Vazdik, W. Zimmermann, A. Gellrich, P. Verrecchia, H. Bergstein, S. D. Kolya, Th. Naumann, F. Ould-Saada, H. Duhm, H.T. Phillips, M. Schulz, E. Deffur, I.F. Fensome, P. Kostka, J. Gayler, J. F. Laporte, P. Ribarics, Y. Soloviev, E. Fretwurst, Tim Greenshaw, A. Buniatian, D. Wegener, W.J. Haynes, A. Lindner, R. Roosen, R. Marshall, P. Hill, J. Bán, J. Heatherington, Emmanuel Monnier, T. Köhler, Volker Blobel, C. Keuker, D. Newton, V. Efremenko, S. Mikocki, Nicolas Ellis, D. Schmidt, M. Seman, P. Lanius, G. C. Lopez, W. Schmitz, V. Tchernyshov, E. Vogel, J. Turnau, V. Boudry, Anton Babaev, J. Strachota, M. Steenbock, B. Andrieu, G. Bernardi, D. Krücker, K. C. Hoeger, V. Riech, M. Hapke, C. Schmidt, J. P. Sutton, U. Braun, R. Gerhards, P. E. Reimer, Alan Campbell, E. M. Hanlon, G. G. Winter, K. Rauschnabel, Wolfgang Lange, G. Grindhammer, P. Steffen, E. Binder, H. P. Wellisch, T. Carli, E. Sanchez, Peter Robmann, A. Bischoff, W. Hildesheim, R. C. W. Henderson, J. R. Smith, S. Willard, O. Dünger, M. Winde, J. P. Pharabod, L. Johnson, C. Kiesling, M. Arpagaus, K. Rybicki, Richard Lander, K. Stephens, E. Peppel, E. Eisenhandler, P. Dingus, J. Martens, F. Kole, W.D. Dau, J. B. Dainton, Claire Bourdarios, J. Feltesse, Max Klein, D. Feeken, P. A. Smirnov, and K. Meier
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Branching fraction, High Energy Physics::Phenomenology, Elementary particle, HERA, Nuclear physics, Excited state, High Energy Physics::Experiment, Leptoquark, Neutrino, Lepton
Abstract: A direct search for new particles in the H1 experiment at HERA is presented for masses ranging from 35 GeV up to ∼ 250 GeV. The data sample of 24 nb −1 accumulated during the first year of operation was analysed for signatures of scalar and vector leptoquarks, leptogluons, excited electrons and excited neutrinos with flavours of the first generation. No evidence for the production of such particles was found in various possible decay channels. Rejection limits are derived.
Published: 1993
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11. Observation of deep inelastic scattering at low x

Author: F. W. Büsser, W. Braunschweig, R. Sell, Grzegorz Nowak, G. Cozzika, C. Jacobsson, U. Siewert, M. Zimmer, E. Malinovski, Stefan Valkar, Vincent Boudry, Jean-Francois Laporte, M. Kuhlen, G. Grindhammer, Hannes Jung, C. Vallée, U. Kathage, P. E. Reimer, P. S. Flower, Alan Campbell, E. M. Hanlon, E. Eisenhandler, P. Staroba, G. G. Winter, Vincent Hedberg, J. Turnau, G. Knies, Leif J. Jönsson, M. Steenbock, G. Bertrand-Coremans, P. Steffen, Kerstin Borras, A. Semenov, G. Thompson, F. Brasse, P. Hartz, R. J. Ellison, B. Andrieu, E. Barrelet, H. Lohmander, A. Wegner, H. P. Wellisch, R. Hedgecock, A. Gellrich, R. Kaschowitz, U. Bassler, J. Moreels, D. Düllmann, Ch. Berger, Karlheinz Meier, C. Trenkel, H. Shooshtari, J. Haack, I. O. Skillicorn, P. Zavada, M. Vecko, K. C. Hoeger, D. Handschuh, I. W. Walker, H. Krehbiel, H. Ziaeepour, J. Kurzhöfer, V. Nagovizin, A. W. E. Dann, R. Eichler, J. P. Kubenka, A. Buniatian, D. Wegener, W.J. Haynes, I. Herynek, K. Rybicki, H. Henschel, M. Gennis, Ch. Ley, Hans Peter Beck, A. Leuschner, Christoph Grab, H. J. Behrend, J.C. Bizot, Frank Raupach, M. Goldberg, H. B. Dreis, M. Colombo, V. Riech, U. Berthon, V. Milone, W.D. Dau, E. Evrard, G. W. Noyes, G. Lindström, P. Hill, J. Bán, C. Gruber, R. Roosen, Emmanuel Monnier, W. Flauger, T. Ahmed, Th. Wolff, Murrough Landon, F. Charles, N. Wulff, A. E. Wright, V. Korbel, I. Sheviakov, M. Hapke, T. Köhler, M. W. Krasny, Armen Vartapetian, P. Kasselmann, H. U. Martyn, Matthias Klein, R. C. W. Henderson, Peter Schacht, G. C. Lopez, U. Krüger, Nicolas Ellis, H. Küster, W. Schmitz, B. Delcourt, R. Felst, G. Bushhorn, M. Eberle, I. R. Kenyon, V. Efremenko, F. Zomer, A. M. Goodall, U. Gensch, E. Vogel, Gregorio Bernardi, P. Baranov, Anton Babaev, C. Leverenz, J. Hladký, S. Eichenberger, H. K. Nguyen, O. Hamon, Jean-Arcady Meyer, H.T. Phillips, V I. Shekelyan, R. Haydar, P. C. Bosetti, H. Spitzer, M. Schulz, I. V. Gorelov, K. Müller, J. D. Burger, S. Peters, C. Schmidt, J. Strachota, U. Braun, S. Mikocki, Peter Schleper, K. Wacker, R. Steinberg, R. Grässler, Ch. Coutures, W. Struczinski, Stephen Maxfield, I.F. Fensome, Hermann Kolanoski, R. Prosi, T. R. Ebert, D. Clarke, R. Gerhards, R. Marshall, Dirk Krücker, A. Lindner, K. Rauschnabel, A. Usik, E. Binder, A. B. Clegg, Andrew Mehta, L. Del Buono, Marc Besancon, J. Gayler, Michel Devel, A.S. Belousov, Sergey Rusakov, S. Kermiche, V. Andreev, Volker Blobel, L.A. Womersley, F. Ould-Saada, E. Sanchez, Dusan Bruncko, R. L. Lander, H. Bärwolff, B. Naroska, F. Ferrarotto, P. Truöl, A. Walther, H. Genzel, I. Tichomirov, John A Coughlan, Horst Oberlack, W. Zimmermann, Peter Robmann, M. Ruffer, S. A. Murray, T. Greenshaw, N. Magnussen, S. Orenstein, A. Fedotov, Günter Flügge, T. P. Yiou, J.P. Phillips, Pavel Murin, V. Brisson, H. Grässler, Rosario Martín, J. Ferencei, L. Criegee, H. Hufnagel, P. Van Esch, J. Sacton, N. Sahlmann, A. Rostovtsev, Claus Kleinwort, J. Ebert, O. Dünger, M. Ibbotson, Martin Erdmann, U. Obrock, J. M. Foster, J. Formánek, P. Biddulph, B. Kuznik, M. A. Jabiol, F. Niebergall, Ph. Huet, C.D. Hilton, M. Savitsky, Ch. Pichler, W. von Schlippe, G. Siegmon, C. A. Meyer, T. Merz, J. Cvach, F. Moreau, P. Fuhrmann, J. D. Dowell, R. J. Thompson, Yves Sirois, A. Jacholkowska, Mikhail Danilov, S. D. Kolya, H. Steiner, L. Goerlich, A. Valkarova, D. Levin, J. Martyniak, C. Kiesling, Roland Bernet, S. Kasarian, B. Fominykh, J. Riedlberger, M. Nyberg, J. Harjes, S. M. Robertson, Eckhart Fretwurst, A. De Roeck, Mario David, G. Franke, Richard E. Taylor, R. Nisius, J. R. Smith, L. Urban, S. Mani, R. Herma, Stephen Burke, J. Duboc, B. Stella, T. Kurča, H. Greif, P. Goritchev, K. Gamerdinger, M. Rudowicz, J. Stier, Leith Godfrey, J. Marks, Y. Vazdik, H. Bergstein, C. Zeitnitz, Th. Naumann, Dave Sankey, H. Duhm, E. Gabathuler, E. Deffur, J.M. Morton, P. Kostka, G. D. Patel, P. Ribarics, Y. Soloviev, H. Meyer, W. Scobel, D.P. Johnson, David Schmidt, T. Carli, A. Lebedev, S. Egli, S. Masson, M. Rietz, D. Haidt, G. Heinzelmann, J.P. Sutton, J. V. Morris, D. Lüers, M. Forbush, A. Schwind, P. Verrecchia, V. Schröder, S. Levonian, H. H. Kaufmann, Eckhard Elsen, A. Mavroidis, P. I. P. Kalmus, Y. Feng, G. A. Beck, J. Garvey, A. M. Fomenko, N. Huot, W. Hildesheim, S. Willard, M. Winde, L. Johnson, M. Fleischer, K. Stephens, E. Peppel, M. Arpagaus, L. Smolik, U. Seehausen, K. Johannsen, J. Zacek, Christophe Royon, D. Gillespie, C. Pascaud, Guenter Eckerlin, R. Vick, J. Tutas, D. Feeken, R. Langkau, Laurent Favart, C. Dollfus, E. Ryseck, Ulrich Goerlach, M. Korn, G. Weber, U. Straumann, P. Dingus, J. Heatherington, D. Newton, Daniel Pitzl, M. Seman, P. Lanius, V. Tchernyshov, J. Martens, F. Kole, S. K. Kotelnikov, L. Hajduk, Peter Loch, J. B. Dainton, W. Pilgram, Claire Bourdarios, J. Feltesse, G. Villet, Pierre Marage, A. Courau, P. A. Smirnov, F. Eisele, Steve McMahon, A. Drescher, M. Jaffre, J. E. Olsson, and W. Bartel
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Luminosity (scattering theory), Proton, Neutral current, Scattering, High Energy Physics::Experiment, Elementary particle, Electron, HERA, Nuclear Experiment, Deep inelastic scattering
Abstract: Measurements of the scattered electron energy spectrum and the differential cross sections dσ/d log(x) and dσ/dQ2 for inclusive neutral current deep inelastic electron-proton scattering are presented. The data were obtained with the H1 detector at HERA during its first running period in which 26.7 GeV electrons collided with 820 GeV protons. The data correspond to an integrated luminosity of 1.3 nb−1 and allow the first studies of the structure of the proton at values of x down to 10−4 for Q2 > 5 GeV2.
Published: 1993
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12. Total photoproduction cross section measurement at HERA energies

Author: J. D. Burger, M. Colombo, R. Prosi, I.F. Fensome, P. S. Flower, Murrough Landon, A. Lindner, F. Zomer, A. M. Goodall, A. E. Wright, Max Klein, J. M. Foster, Volker Blobel, C. Kiesling, L. Del Buono, M. Savitsky, Leif J. Jönsson, K. C. Hoeger, J. Hladký, D. Schmidt, M. Nyberg, S. Levonian, S. Peters, H. Lohmander, P. A. Smirnov, K. Meier, G. Cozzika, F. Eisele, P. Závada, V. Riech, Peter Schacht, G. C. Lopez, H. Küster, W. Schmitz, J. Cvach, M. Arpagaus, K. Rybicki, T. Ahmed, J.P. Phillips, E. Vogel, Gregorio Bernardi, V. Boudry, Anton Babaev, M. Hapke, K. Stephens, E. Peppel, R. Nisius, R. J. Thompson, Yves Sirois, A. Usik, J. Strachota, Hannes Jung, P. Baranov, B. Kuznik, N. Magnussen, W. Hildesheim, Roland Bernet, N. Sahlmann, Ph. Huet, E. Eisenhandler, Ch. Pichler, Peter Schleper, G. Villet, S. Egli, S. Willard, Pavel Murin, V. Brisson, E. Evrard, G. Franke, H. Grässler, H. Bergstein, J. Riedlberger, Th. Wolff, Stephen Maxfield, J. Harjes, S. M. Robertson, Vincent Hedberg, G. Knies, G. Siegmon, A. Buniatian, Pierre Marage, M. Jaffre, J. E. Olsson, W. Bartel, S. D. Kolya, Th. Naumann, J. Turnau, P. Biddulph, Laurent Favart, P. Dingus, A. B. Clegg, Andrew Mehta, I. R. Kenyon, R. Gerhards, J. Martens, H. Spitzer, D. Wegener, W.J. Haynes, M. Steenbock, F. W. Büsser, Marc Besancon, A.S. Belousov, W. Braunschweig, C. Dollfus, P. Truöl, R. Roosen, A. Courau, M. Winde, B. Delcourt, Emmanuel Monnier, R. Sell, L. Johnson, Ulrich Goerlach, M. Korn, M. A. Jabiol, P. Staroba, I. W. Walker, J. Haack, F. Moreau, J. D. Dowell, P. Goritchev, H. Duhm, U. Siewert, I. Tichomirov, Grazyna Nowak, M. Zimmer, R. Herma, P. E. Reimer, T. Köhler, B. Andrieu, C. Leverenz, A. Leuschner, Christoph Grab, G. Weber, M. Ruffer, Jean-Francois Laporte, S. Orenstein, Michel Devel, I. O. Skillicorn, H. B. Dreis, A. Jacholkowska, S. Mani, M. Vecko, K. Gamerdinger, E. Barrelet, O. Hamon, U. Straumann, Alan Campbell, E. M. Hanlon, J. B. Dainton, Claire Bourdarios, J. Zacek, J. Ebert, A. Gellrich, G. G. Winter, H. Hufnagel, V. Efremenko, E. Deffur, U. Berthon, Frank Raupach, Armen Vartapetian, G. Grindhammer, H. Shooshtari, C. A. Meyer, J. Heatherington, P. Steffen, H. U. Martyn, S. Mikocki, J.M. Morton, N. Wulff, P. Kostka, P. Ribarics, Ch. Ley, Hermann Kolanoski, D. Clarke, John A Coughlan, P. Kasselmann, P. Fuhrmann, C.D. Hilton, G. Thompson, Ch. Berger, Horst Oberlack, Y. Soloviev, H. P. Wellisch, J. Duboc, B. Stella, D. Feeken, H. Greif, S. Kermiche, L. Goerlich, M. Rudowicz, C. Trenkel, D. Düllmann, Mikhail Danilov, H. Steiner, S. Eichenberger, Stephen Burke, U. Bassler, R. L. Lander, H. Bärwolff, Daniel Pitzl, H. J. Behrend, J.C. Bizot, M. Goldberg, L. Criegee, R. Kaschowitz, D. Levin, J. Martyniak, H. K. Nguyen, I. V. Gorelov, K. Müller, V. Milone, W.D. Dau, A. Mavroidis, R. Grässler, Ch. Coutures, W. Struczinski, F. Kole, E. Ryseck, S. Rusakov, J. Formánek, B. Fominykh, Tim Greenshaw, S. K. Kotelnikov, L. Hajduk, R. Felst, P. I. P. Kalmus, M. Eberle, I. Herynek, J. Moreels, Eckhart Fretwurst, J-P. Meyer, Peter Loch, Hans Peter Beck, D. Newton, W. Pilgram, T. Merz, M. Ibbotson, C. Jacobsson, Steve McMahon, T. R. Ebert, M. Seman, S. Kasarian, P. Lanius, P. Hill, J. Bán, V. Tchernyshov, Mario David, A. Fedotov, A. Drescher, M. W. Krasny, Günter Flügge, T. P. Yiou, U. Kathage, E. Malinovski, M. Kuhlen, E. Gabathuler, Nicolas Ellis, Kerstin Borras, A. Semenov, F. Brasse, A. De Roeck, P. Hartz, R. J. Ellison, R. Hedgecock, C. Vallée, Richard E. Taylor, J.R. Smith, M. Gennis, G. Lindström, C. Gruber, W. Flauger, L. Urban, H. Henschel, T. Kurča, J. Stier, J. Marks, Y. Vazdik, G. Bertrand-Coremans, A. Wegner, H. Ziaeepour, J. Kurzhöfer, V. Nagovizin, A. W. E. Dann, R. Eichler, J. P. Kubenka, G. W. Noyes, Peter Robmann, W. von Schlippe, L. Smolik, U. Seehausen, K. Johannsen, F. Charles, Christophe Royon, I. Sheviakov, D. Gillespie, U. Krüger, B. Naroska, J. Sacton, C. Pascaud, Guenter Eckerlin, R. Vick, J. Tutas, V I. Shekelyan, R. Haydar, P. C. Bosetti, O. Dünger, R. Langkau, K. Wacker, R. Steinberg, G. A. Beck, J. Garvey, A. M. Fomenko, Dusan Bruncko, S. A. Murray, F. Ferrarotto, H. Genzel, N. Huot, K. Rauschnabel, E. Binder, Martin Erdmann, H. Obrock, Rosario Martín, F. Niebergall, V. Korbel, J. Ferencei, P. Van Esch, E. Elsen, E. Sanchez, A. Rostovtsev, Claus Kleinwort, L.A. Womersley, A. Valkarova, Vladimir Andreev, U. Gensch, A. Walther, F. Ould-Saada, C. Schmidt, U. Braun, W. Zimmermann, D. Handschuh, H. Krehbiel, D. Lüers, P. Verrecchia, G. Buschhorn, V. Schröder, H. H. Kaufmann, Leith Godfrey, H.T. Phillips, M. Schulz, J. Gayler, S. Masson, R. Marshall, Dirk Krücker, J. V. Morris, Y. Feng, M. Forbush, A. Schwind, A. Lebedev, M. Rietz, D. Haidt, G. Heinzelmann, M. Fleischer, J.P. Sutton, S. Valkar, C. Zeitnitz, Dave Sankey, G. D. Patel, H. Meyer, W. Scobel, D.P. Johnson, T. Carli, R. C. W. Henderson, and J. Feltesse
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Photon, Hadron, Elementary particle, Electron, HERA, Nuclear physics, Cross section (physics), High Energy Physics::Experiment, Center of mass, Nuclear Experiment
Abstract: We present first results on the total photoproduction cross section measurement with the H1 detector at HERA. The data were extracted from low Q2 collisions of 26.7 GeV electrons with 820 GeV protons. The γp total cross section has been measured by two independent methods in the γp center of mass energy range from 90 to 290 GeV. For an average center of mass energy of 195 GeV a value of σtot (γp) = 159 ± 7 (stat.) ± 20 (syst.) μb was obtained.
Published: 1993
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13. Hard scattering in γp interactions

Author: Alan Campbell, E. M. Hanlon, G. G. Winter, T. Ahmed, G. Grindhammer, P. Steffen, P. Baranov, M. Jaffre, J. E. Olsson, J-P. Meyer, Peter Schleper, H. P. Wellisch, W. Bartel, C. Schmidt, U. Braun, F. W. Büsser, Marc Besancon, W. Braunschweig, Stephen Maxfield, W. von Schlippe, R. Sell, A. DeRoeck, T. Merz, U. Siewert, M. Zimmer, A.S. Belousov, W. Pilgram, P. Truöl, A. Buniatian, Jean-Francois Laporte, M. Ibbotson, M. Rüffer, P. Loch, I. Tichomirov, D. Wegener, W.J. Haynes, A. B. Clegg, B. Kuznik, Emmanuel Monnier, C. A. Meyer, R. Kaschowitz, K. C. Hoeger, Andrew Mehta, D. Handschuh, H. Krehbiel, Leif J. Jönsson, H. Lohmander, S. Kasarian, Frank Raupach, S. A. Murray, T. Köhler, M. W. Krasny, S. M. Robertson, I. R. Kenyon, H. Spitzer, H. U. Martyn, V. Riech, Ph. Huet, K. Rauschnabel, N. Wulff, Armen Vartapetian, Ch. Pichler, E. Binder, J. Riedlberger, Michel Devel, G. Thompson, V. Efremenko, H. Hufnagel, P. Kasselmann, P. VanEsch, M. Hapke, G. Buschhorn, P. Fuhrmann, P. Hill, J. Bán, S. Mikocki, E. Sanchez, D. Düllmann, E. Vogel, L. Goerlich, R. C. W. Henderson, C.D. Hilton, Kerstin Borras, Vincent Hedberg, G. Knies, S. Orenstein, Nicolas Ellis, H. J. Behrend, J.C. Bizot, M. Goldberg, Martin Erdmann, W. Zimmermann, U. Obrock, J. Moreels, A. Semenov, R. Gerhards, E. Malinovski, J. Ference, H. Steiner, G. Bertrand-Coremans, F. Niebergall, V. Korbel, R. Roosen, N. Magnussen, D. Levin, J. Martyniak, M. Kuhlen, D. Lüers, G. Cozzika, F. Eisele, J.P. Phillips, R. Bernet, Stefan Valkar, L. Criegee, N. Sahlmann, A. Usik, J. Ebert, J. Haack, B. Fominykh, R. Nisius, R. Prosi, F. Brasse, R. L. Lander, Peter Robmann, H. Shooshtari, S. Egli, P. Hartz, I. O. Skillicorn, Hannes Jung, H. B. Dreis, T. R. Ebert, H. Bärwolff, E. Barrelet, S. Rusakov, J. Formánek, P. Biddulph, M. A. Jabiol, J. Zacek, S. Mani, U. Berthon, P. Staroba, A. Wegner, Vladimir Andreev, D. Gillespie, M. Danilov, Ch. Ley, P. Verrecchia, A. Fedotov, Ch. Berger, H. P. Beck, Hermann Kolanoski, D. Clarke, Eckhart Fretwurst, Günter Flügge, Stephen Burke, T. P. Yiou, J. Turnau, D. P. C. Sankey, I. F. Fensome, U. Bassler, R. J. Ellison, I. W. Walker, E. Evrard, O. Dünger, C. Trenkel, M. Steenbock, G. A. Beck, R. Hedgecock, A. Leuschner, Christoph Grab, F. Zomer, A. M. Goodall, H. Ziaeepour, J. Kurzhöfer, B. Andrieu, M. Colombo, V. Milone, Murrough Landon, V. Nagovizin, A. W. E. Dann, W.D. Dau, John A Coughlan, A. Babayev, J. Hladky, R. Eichler, I. Herynek, Horst Oberlack, G. Siegmon, B. Delcourt, A. Lebedev, L. Delbuono, Grzegorz Nowak, C. Vallée, H. K. Nguyen, I. V. Gorelov, K. Müller, M. Schulz, J. Gayler, R. Grässler, Ch. Coutures, W. Struczinski, A. E. Wright, V. Schröder, R. Felst, Richard E. Taylor, M. Eberle, J. M. Foster, C. Leverenz, J. Duboc, B. Stella, S. Eichenberger, H. Greif, F. Ould-Saada, O. Hamon, J. P. Kubenka, M. Savitsky, L. A. Womersley, P. Zavada, M. Vecko, L. Urban, R. J. Thompson, Yves Sirois, U. Gensch, M. Rietz, H. Henschel, F. Moreau, H. H. Kaufmann, J. D. Dowell, M. Rudowicz, J. Cvach, T. Kurča, J. R. Smith, R. Marshall, Dirk Krücker, S. Peters, A. Jacholkowska, R. Herma, U. Kathage, M. Gennis, D. Haidt, Dusan Bruncko, G. Franke, E. Gabathuler, F. Ferrarotto, H. Genzel, G. Lindström, C. Gruber, W. Flauger, Leith Godfrey, A. Walther, M. Nyberg, J. Harjes, P. Goritchev, A. Valkarova, Rosario Martín, K. Gamerdinger, E. Elsen, J. Marks, H. Bergstein, A. Rostovtsev, S. D. Kolya, Claus Kleinwort, Th. Naumann, H. Duhm, F. Charles, I. Sheviakov, E. Deffur, U. Krüger, J.M. Morton, P. Kostka, P. Ribarics, Y. Soloviev, M. David, V I. Shekelyan, R. Haydar, P. C. Bosetti, K. Wacker, R. Steinberg, G. Heinzelmann, U. Lenhardt, S. Levonian, M. Fleischer, S. Kermiche, J.P. Sutton, J. Bürger, A. Mavroidis, H. Küster, P. I. P. Kalmus, S. Masson, C. Zeitnitz, G. D. Patel, H. Meyer, W. Scobel, D.P. Johnson, A. Gellrich, M. Th. Wolff, T. Carli, J. V. Morris, M. Forbush, A. Schwind, L. Smolik, U. Seehausen, K. Johannsen, Christophe Royon, Y. Feng, B. Naroska, C. Pascaud, Guenter Eckerlin, R. Vick, J. Tutas, R. Langkau, H. Grässler, J. Garvey, A. M. Fomenko, N. Huot, J. Feltesse, D. Feeken, Max Klein, C. Kiesling, P. A. Smirnov, K. Meier, J. Martens, F. Kole, M. Arpagaus, K. Rybicki, J. B. Dainton, Claire Bourdarios, W. Hildesheim, K. Stephens, E. Peppel, H. T. Phillips, E. Eisenhandler, S. Willard, P. Dingus, J. Vasdik, M. Winde, L. Johnson, Steve McMahon, Tim Greenshaw, J. Heatherington, Pavel Murin, V. Brisson, D. Newton, M. Seman, G. W. Noyes, P. Lanius, V. Tchernyshov, Laurent Favart, A. Drescher, C. Dollfus, Ulrich Goerlach, E. Ryseck, M. Korn, Daniel Pitzl, G. Weber, U. Straumann, Volker Blobel, D. Schmidt, S. K. Kotelnikov, L. Hajduk, Peter Schacht, G. C. Lopez, W. Schmitz, C. Jacobson, Gregorio Bernardi, V. Boudry, J. Strachota, Jean Sacton, G. Villet, Pierre Marage, A. Courau, and P. E. Reimer
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Photon, Scattering, Detector, HERA, Jet (particle physics), Spectral line, law.invention, Nuclear physics, law, High Energy Physics::Experiment, Collider
Abstract: We report on the investigation of the final state in interactions of quasi-real photons with protons. The data were taken with the H1 detector at the HERA ep collider. Evidence for hard interactions is seen in both single particle spectra and jet formation. The data can best be described by inclusion of resolved photon processess as predicted by QCD.
Published: 1992
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14. The tracking calorimeter and muon detectors of the H1 experiment at Hera

Author: L. N. Shtarkov, A. Panitch, G. Tappern, R. Nisius, Armen Vartapetian, P. S. Flower, R. Bernet, D. White, K. C. Hoeger, B. Morgan, H. Bergstein, S. D. Kolya, Th. Naumann, U. Bassler, J. Žáček, A. B. Lodge, P. Jovanovic, F. Linsel, J. P Dewulf, H. Novakova, K. Gabathuler, A. Buniatian, D. Wegener, W.J. Haynes, J. R. Smith, R. Herma, S. Schiek, H. Duhm, V. Milone, E. Gažo, J. Mock, Tim Greenshaw, A. Sirous, N.H. Cunliffe, F. Blouzon, Vincent Hedberg, G. Knies, A. Wegner, Paul Richard Newman, Grzegorz Nowak, Emmanuel Monnier, C. Jacobsson, L. R. West, S. Kermiche, Michael Schulz, J. M. Foster, P. Štefan, J-P. Meyer, W. von Schlippe, Leif J. Jönsson, E. Deffur, M. Lemler, T. Köhler, M. W. Krasny, Vladimir Andreev, J. Heatherington, H. Ziaeepour, E. Panaro, J. Kurzhöfer, T. Merz, M. Ibbotson, J. Duboc, B. Stella, D. Hammer, S. Kasarian, Leith Godfrey, P. Ribarics, V. Nagovizin, A. W. E. Dann, L. Laptin, S. Mani, R. Felst, J. Haack, G. Martin, S. Levonian, K. Stephens, H. P. Beck, J.M. Morton, P. Kostka, H. Greif, R. Eichler, I. O. Skillicorn, J.P. Lottin, H. Lohmander, Derek L. G. Hill, V. Efremenko, S. Eichenberger, H. B. Dreis, J. P. Kubenka, U. Gensch, J. H. Köhne, J. Huber, R. Kaschowitz, R. Bernier, D. Newton, K. Zuber, A. Lebedev, Stephen Burke, M. Eberle, J. Staeck, E. Peppel, D. Handschuh, M. Wagener, W. Hildesheim, J. Ferencei, Roland Horisberger, M. Colombo, M. Rietz, S. Aid, K. Flamm, D. Imbault, M. David, Murrough Landon, R.L. Chase, A. E. Wright, H. Krehbiel, A. Valkárová, A. Mavroidis, G. Kemmerling, V. Tchudakov, G. W. Noyes, G. Siegmon, A. Pieuchot, S. Mikocki, M. Seman, K. Rüter, S. Riess, F. Zomer, A. M. Goodall, H. T. Blume, F. Charles, R. Beyer, L. Del Buono, I. Sheviakov, E. Malinovski, M. Kuhlen, U. Dretzler, K. Hangarter, U. Kathage, E. Eisenhandler, D. Haidt, D. Breton, J. Moreels, J. Cvach, K. Thiele, C. Niebuhr, C. Gregory, S. Egli, P. Lanius, K. Gadow, A. Reboux, P. I. P. Kalmus, B. Laforge, Mikhail Danilov, D. Lewin, H. Steiner, Th. Wolff, R. Roosen, D. Kant, F. Moreau, J. Hladký, J. D. Dowell, Zhen Zhang, Y. Soloviev, H. Itterbeck, S. Peters, P. Van Mechelen, M. Charlet, M. Rudowicz, G. Heinzelmann, P E. Hatton, I. Abt, F. Ould-Saada, G. Buschhorn, H. I. Cronström, Z.Y. Feng, U. Lenhardt, U. Harder, V. Tchernyshov, H.-J. Küsel, P. Hill, Steve McMahon, Kerstin Borras, U. Krüger, J.F. Huppert, M. Kolander, Carl R. Brune, M. Barth, E. Gabathuler, J. David, J. Bán, F. Descamps, M. Fleischer, T. R. Ebert, A. Semenov, H. Shooshtari, A. Jacholkowska, J. Martyniak, S. Dagoret, C. A. Meyer, R. J. Thompson, Yves Sirois, H. U. Martyn, A. Busata, A. Fedotov, Günter Flügge, U. Seehausen, T. P. Yiou, U. Krüner-Marquis, M. Vecko, J. C. Biasci, I. W. Walker, I. R. Kenyon, T. Novák, D. Mercer, F. Sefkow, H. Spitzer, A. Gruber, H. Küster, G. Kantel, N. Lugetski, G. Bertrand-Coremans, M. C. Cousinou, K. Johannsen, M. Urban, V I. Shekelyan, R. Haydar, B. Fominykh, A. Leuschner, Christoph Grab, Nicolas Ellis, A. Rudge, P. Fuhrmann, J. Lipinski, C. Zeitnitz, E. Wünsch, K. Wacker, R. Steinberg, A. Nepeipivo, Christophe Royon, M. Korn, K. Ludwig, B. Liss, G. Falley, S. Masson, E. Barrelet, Dave Sankey, P. Burmeister, P. Dingus, F. Krivan, A. Usik, Ch. Ley, J. Feltesse, L. Criegee, G. Franke, A. De Roeck, F. Brasse, L. Goerlich, D. Gillespie, Richard E. Taylor, Michel Devel, B. Naroska, T. Jansen, Emmanuelle Perez, Winston Ko, G. Weber, Björn Lundberg, P. Hartz, V. Masbender, M. Kubantsev, J.F. Connolly, Max Klein, R. J. Ellison, L. Urban, U. Straumann, F. Dupont, C. Pascaud, G. D. Patel, H. Meyer, R. von Staa, S. Rusakov, L. Van Lancker, Dusan Bruncko, P. Nayman, W. Pimpl, Ch. Berger, F. Ferrarotto, H. Henschel, A. Gellrich, U. Berthon, F. Lamarche, T. Kurča, G. Rädel, J. Schütt, A. Drescher, N. Magnussen, Guenter Eckerlin, R. Vick, D.P. Johnson, M. Jaffre, J. E. Olsson, P. Jean, L. Gosset, H. Genzel, W. Fröchtenicht, S. A. Murray, W. Bartel, B. Koppitz, M. Hampel, B. Kuznik, J. Formánek, N. Sahlmann, E. Schuhmann, H. Brettel, P. A. Smirnov, K. Meier, C. Beigbeder, Ph. Huet, K. Tröger, C. Trenkel, G. Reinmuth, Wolfgang Scobel, D. Darvill, P. Biddulph, P. Binko, R. Ebbinghaus, J. Koch, L. Büngener, Ch. Pichler, D. Bederede, J. Martens, H. Laskus, M. Flieser, Kaori Maeshima, F. Kole, Martin Erdmann, Eckhart Fretwurst, J. Stier, J. V. Morris, D. A. Cragg, D. Newman-Coburn, Hermann Kolanoski, Jan Godlewski, M. A. Jabiol, G. Villet, S. Schleif, U. Obrock, J. Marks, F. Niebergall, V. Korbel, Pierre Marage, G. Schmidt, Y. Vazdik, D. Clarke, G. A. Beck, J. Garvey, F. W. Büsser, R B. Hopes, John A Coughlan, A. Coville, R. C. W. Henderson, U. Cornett, C. Vallée, Elzbieta Banas, Rosario Martín, P. Goritchev, A. Epifantsev, H. Quehl, A. M. Fomenko, U. Pein, K. Gamerdinger, Horst Oberlack, Vladimir Rusinov, L. Smolik, H. K. Nguyen, I. Herynek, P. Perrodo, Pavel Shatalov, W. Tribanek, J. Tutas, R. D. Appuhn, W. Braunschweig, M. Forbush, I. V. Gorelov, K. Müller, A. Schwind, R. Sell, S. Tapprogge, W.D. Dau, M. Vanderkelen, D. Lüers, J. D. Burger, Petr Zavada, P. Weissbach, E. Elsen, R. Prosi, Pavel Murin, V. Brisson, H. Grässler, Pavel Staroba, C. Arnault, B. Dulny, A. Courau, J. B. Dainton, C. Paulot, J. Spalek, I. Tichomirov, L.A. Womersley, Claire Bourdarios, R. Grässler, Ch. Coutures, W. Struczinski, Stephen Maxfield, J L. Mills, P. Verrecchia, P. Škvařil, C R. Hedgecock, D. Neyret, N. Huot, U. Siewert, R. L. Lander, H. Bärwolff, J. Stiewe, S. Palanque, A. Rostovtsev, Claus Kleinwort, J. Fent, M. Gennis, B W H. Edwards, V. Schröder, G. Van Beek, A. B. Clegg, Andrew Mehta, J. Riedlberger, H. H. Kaufmann, N. Gogitidze, M. Zimmer, C. Gruber, A. Patoux, M. Nyberg, J. Harjes, S. M. Robertson, A. Walther, W. Flauger, Jean-Francois Laporte, Laurent Favart, Z. Szkutnik, J. Turnau, M. Ruffer, G. Ernst, S. Orenstein, W. Zimmermann, B E. Wyborn, M. Steenbock, I. Giesgen, C. Dollfus, R. Bernard, P. Pailler, J. Ebert, B. Andrieu, A. Strowbridge, H. Hufnagel, Daniel Pitzl, K. Geske, J. Koll, Frank Raupach, K. Finke, S. Günther, S. K. Kotelnikov, L. Hajduk, N. Wulff, A. Perus, Ulrich Goerlach, P. Kasselmann, E. Evrard, Peter Loch, J. Gayler, C.D. Hilton, U. Buchner, G. Lindström, M. Turiot, A. Porrovecchio, B. Delcourt, U. Stösslein, M. Grewe, B. Montes, C. Leverenz, R. Marshall, Dirk Krücker, O. Hamon, V. Bidoli, P. Baranov, D.E. Baynham, V. Commichau, G. Cozzika, Peter Schleper, P. Röpnack, F. Eisele, A. Lindner, J. Janoth, Marc Besancon, A.S. Belousov, J.P. Phillips, Stefan Valkar, P. Truöl, F. Basti, H T. Phillips, Volker Blobel, C. Keuker, Hannes Jung, D. Schmidt, K. Rosenbauer, M. Haguenauer, Peter Schacht, G. C. Lopez, Rudolf Langkau, W. Schmitz, M. Savitski, E. Vogel, Gregorio Bernardi, V. Boudry, Anton Babaev, C. Thiebaux, A. Ducorps, J. Strachota, Jean Sacton, G. Thompson, A. Cyz, H. Riege, D. Düllmann, H. J. Behrend, J.C. Bizot, M. Goldberg, Peter Robmann, J. Šťastný, V. Riech, O. Dünger, M. Hapke, R. Gerhards, P. E. Reimer, Alan Campbell, E. M. Hanlon, J. Jeanjean, G. G. Winter, G. Grindhammer, P. Steffen, Jolanta Olszowska, D. Zarbock, H. P. Wellisch, T. Carli, K. Rauschnabel, Wolfgang Lange, E. Binder, E. Sanchez, D. Sole, S. Prell, I F. Fensome, S. Reinshagen, C. Kiesling, T. Kobler, R J. Day, K. Djiki, T. Külper, S. Karstensen, N. Schirm, M. Arpagaus, K. Rybicki, C. Schmidt, J. P. Sutton, W. Glasgow, Wolfram Erdmann, T. Ahmed, J. Meissner, D. Feeken, J.Y. Parey, S. Willard, H. Schmücker, M. Winde, J. P. Pharabod, L. Johnson, J.M. Baze, F. Martin, V. Lubimov, A. Hrisoho, Kerec, Hélène, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Laboratoire de l'Accélérateur Linéaire ( LAL ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de Physique des Particules de Marseille ( CPPM ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Aix Marseille Université ( AMU ), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Elementary Particle Physics, and Vrije Universiteit Brussel
Subjects: Physics, Nuclear and High Energy Physics, Luminosity (scattering theory), Calorimeter (particle physics), [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, HERA, Tracking (particle physics), 7. Clean energy, 01 natural sciences, Nuclear physics, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, Calibration, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Instrumentation, Storage ring, Muon detector
Abstract: Technical aspects of the three major components of the H1 detector at the electron-proton storage ring HERA are described. This paper covers the detector status up to the end of 1994 when a major upgrading of some of its elements was undertaken. A description of the other elements of the detector and some performance figures from luminosity runs at HERA during 1993 and 1994 are given in a paper previously published in this journal.
Published: 1997

15. The H1 detector at HERA

Author: I. Abt, T. Ahmed, S. Aid, V. Andreev, B. Andrieu, R.D. Appuhn, C. Arnault, M. Arpagaus, A. Babaev, H. Bärwolff, J. Bán, E. Banas, P. Baranov, E. Barrelet, W. Bartel, M. Barth, U. Bassler, F. Basti, D.E. Baynham, J.-M. Baze, G.A. Beck, H.P. Beck, D. Bederede, H.-J. Behrend, C. Beigbeder, A. Belousov, Ch. Berger, H. Bergstein, R. Bernard, G. Bernardi, R. Bernet, R. Bernier, U. Berthon, G. Bertrand-Coremans, M. Besançon, R. Beyer, J.-C. Biasci, P. Biddulph, V. Bidoli, E. Binder, P. Binko, J.-C. Bizot, V. Blobel, F. Blouzon, H. Blume, K. Borras, V. Boudry, C. Bourdarios, F. Brasse, W. Braunschweig, D. Breton, H. Brettel, V. Brisson, D. Bruncko, C. Brune, U. Buchner, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, P. Burmeister, A. Busata, G. Buschhorn, A.J. Campbell, T. Carli, F. Charles, M. Charlet, R. Chase, D. Clarke, A.B. Clegg, M. Colombo, V. Commichau, J.F. Connolly, U. Cornett, J.A. Coughlan, A. Courau, M.-C. Cousinou, Ch. Coutures, A. Coville, G. Cozzika, D.A. Cragg, L. Criegee, H.I. Cronström, N.H. Cunliffe, J. Cvach, A. Cyz, S. Dagoret, J.B. Dainton, M. Danilov, A.W.E. Dann, D. Darvill, W.D. Dau, J. David, M. David, R.J. Day, E. Deffur, B. Delcourt, L. Del Buono, F. Descamps, M. Devel, J.P. Dewulf, A. De Roeck, P. Dingus, K. Djidi, C. Dollfus, J.D. Dowell, H.B. Dreis, A. Drescher, U. Dretzler, J. Duboc, A. Ducorps, D. Düllmann, O. Dünger, H. Duhm, B. Dulny, F. Dupont, R. Ebbinghaus, M. Eberle, J. Ebert, T.R. Ebert, G. Eckerlin, B.W.H. Edwards, V. Efremenko, S. Egli, S. Eichenberger, R. Eichler, F. Eisele, E. Eisenhandler, N.N. Ellis, R.J. Ellison, E. Elsen, A. Epifantsev, M. Erdmann, W. Erdmann, G. Ernst, E. Evrard, G. Falley, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, Z.Y. Feng, I.F. Fensome, J. Fent, J. Ferencei, F. Ferrarotto, K. Finke, K. Flamm, W. Flauger, M. Fleischer, M. Flieser, P.S. Flower, G. Flügge, A. Fomenko, B. Fominykh, M. Forbush, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, W. Fröchtenicht, P. Fuhrmann, E. Gabathuler, K. Gabathuler, K. Gadow, K. Gamerdinger, J. Garvey, J. Gayler, E. Gažo, A. Gellrich, M. Gennis, U. Gensch, H. Genzel, R. Gerhards, K. Geske, I. Giesgen, D. Gillespie, W. Glasgow, L. Godfrey, J. Godlewski, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, A.M. Goodall, I. Gorelov, P. Goritchev, L. Gosset, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, C. Gregory, H. Greif, M. Grewe, G. Grindhammer, A. Gruber, C. Gruber, S. Günther, J. Haack, M. Haguenauer, D. Haidt, L. Hajduk, D. Hammer, O. Hamon, M. Hampel, D. Handschuh, K. Hangarter, E.M. Hanlon, M. Hapke, U. Harder, J. Harjes, P. Hartz, P.E. Hatton, R. Haydar, W.J. Haynes, J. Heatherington, V. Hedberg, C.R. Hedgecock, G. Heinzelmann, R.C.W. Henderson, H. Henschel, R. Herma, I. Herynek, W. Hildesheim, P. Hill, D.L. Hill, C.D. Hilton, J. Hladký, K.C. Hoeger, R.B. Hopes, R. Horisberger, A. Hrisoho, J. Huber, Ph. Huet, H. Hufnagel, N. Huot, J.-F. Huppert, M. Ibbotson, D. Imbault, H. Itterbeck, M.-A. Jabiol, A. Jacholkowska, C. Jacobsson, M. Jaffré, T. Jansen, P. Jean, J. Jeanjean, L. Jönsson, K. Johannsen, D.P. Johnson, L. Johnson, P. Jovanovic, H. Jung, P.I.P. Kalmus, D. Kant, G. Kantel, S. Karstensen, S. Kasarian, R. Kaschowitz, P. Kasselmann, U. Kathage, H.H. Kaufmann, G. Kemmerling, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, W. Ko, T. Kobler, J. Koch, T. Köhler, J. Köhne, M. Kolander, H. Kolanoski, F. Kole, J. Koll, S.D. Kolya, B. Koppitz, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, M.W. Krasny, H. Krehbiel, F. Krivan, D. Krücker, U. Krüger, U. Krüner-Marquis, M. Kubantsev, J.P. Kubenka, T. Külper, H.-J. Küsel, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, B. Kuznik, B. Laforge, F. Lamarche, R. Lander, M.P.J. Landon, W. Lange, R. Langkau, P. Lanius, J.-F. Laporte, L. Laptin, H. Laskus, A. Lebedev, M. Lemler, U. Lenhardt, A. Leuschner, C. Leverenz, S. Levonian, D. Lewin, Ch. Ley, A. Lindner, G. Lindström, F. Linsel, J. Lipinski, B. Liss, P. Loch, A.B. Lodge, H. Lohmander, G.C. Lopez, J.-P. Lottin, V. Lubimov, K. Ludwig, D. Lüers, N. Lugetski, B. Lundberg, K. Maeshima, N. Magnussen, E. Malinovski, S. Mani, P. Marage, J. Marks, R. Marshall, J. Martens, F. Martin, G. Martin, R. Martin, H.-U. Martyn, J. Martyniak, V. Masbender, S. Masson, A. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, J. Meissner, D. Mercer, T. Merz, C.A. Meyer, H. Meyer, J. Meyer, S. Mikocki, J.L. Mills, V. Milone, J. Möck, E. Monnier, B. Montés, F. Moreau, J. Moreels, B. Morgan, J.V. Morris, J.M. Morton, K. Müller, P. Murín, S.A. Murray, V. Nagovizin, B. Naroska, Th. Naumann, P. Nayman, A. Nepeipivo, P. Newman, D. Newman-Coburn, D. Newton, D. Neyret, H.K. Nguyen, F. Niebergall, C. Niebuhr, R. Nisius, T. Novák, H. Nováková, G. Nowak, G.W. Noyes, M. Nyberg, H. Oberlack, U. Obrock, J.E. Olsson, J. Olszowska, S. Orenstein, F. Ould-Saada, P. Pailler, S. Palanque, E. Panaro, A. Panitch, J.-Y. Parey, C. Pascaud, G.D. Patel, A. Patoux, C. Paulot, U. Pein, E. Peppel, E. Perez, P. Perrodo, A. Perus, S. Peters, J.-P. Pharabod, H.T. Phillips, J.P. Phillips, Ch. Pichler, A. Pieuchot, W. Pimpl, D. Pitzl, A. Porrovecchio, S. Prell, R. Prosi, H. Quehl, G. Rädel, F. Raupach, K. Rauschnabel, A. Reboux, P. Reimer, G. Reinmuth, S. Reinshagen, P. Ribarics, V. Riech, J. Riedlberger, H. Riege, S. Riess, M. Rietz, S.M. Robertson, P. Robmann, P. Röpnack, R. Roosen, K. Rosenbauer, A. Rostovtsev, C. Royon, A. Rudge, K. Rüter, M. Rudowicz, M. Ruffer, S. Rusakov, V. Rusinov, K. Rybicki, J. Sacton, N. Sahlmann, E. Sanchez, D.P.C. Sankey, M. Savitski, P. Schacht, S. Schiek, N. Schirm, S. Schleif, P. Schleper, W. von Schlippe, C. Schmidt, D. Schmidt, G. Schmidt, W. Schmitz, H. Schmücker, V. Schröder, J. Schütt, E. Schuhmann, M. Schulz, A. Schwind, W. Scobel, U. Seehausen, F. Sefkow, R. Sell, M. Seman, A. Semenov, P. Shatalov, V. Shekelyan, I. Sheviakov, H. Shooshtari, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, A. Sirous, I.O. Skillicorn, P. Škvařil, P. Smirnov, J.R. Smith, L. Smolik, D. Sole, Y. Soloviev, J. Špalek, H. Spitzer, R. von Staa, J. Staeck, P. Staroba, J. Šťastný, M. Steenbock, P. Štefan, P. Steffen, R. Steinberg, H. Steiner, B. Stella, K. Stephens, J. Stier, J. Stiewe, U. Stösslein, J. Strachota, U. Straumann, A. Strowbridge, W. Struczinski, J.P. Sutton, Z. Szkutnik, G. Tappern, S. Tapprogge, R.E. Taylor, V. Tchernyshov, V. Tchudakov, C. Thiebaux, K. Thiele, G. Thompson, R.J. Thompson, I. Tichomirov, C. Trenkel, W. Tribanek, K. Tröger, P. Truöl, M. Turiot, J. Turnau, J. Tutas, L. Urban, M. Urban, A. Usik, Š. Valkár, A. Valkárová, C. Vallée, G. Van Beek, M. Vanderkelen, L. Van Lancker, P. Van Mechelen, A. Vartapetian, Y. Vazdik, M. Vecko, P. Verrecchia, R. Vick, G. Villet, E. Vogel, K. Wacker, M. Wagener, I.W. Walker, A. Walther, G. Weber, D. Wegener, A. Wegner, P. Weissbach, H.P. Wellisch, L. West, D. White, S. Willard, M. Winde, G.-G. Winter, Th. Wolff, L.A. Womersley, A.E. Wright, E. Wünsch, N. Wulff, B.E. Wyborn, T.P. Yiou, J. Žáček, D. Zarbock, P. Závada, C. Zeitnitz, Z. Zhang, H. Ziaeepour, M. Zimmer, W. Zimmermann, F. Zomer, K. Zuber, Laboratoire de Physique Nucléaire et de Hautes Énergies ( LPNHE ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de l'Accélérateur Linéaire ( LAL ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de Physique des Particules de Marseille ( CPPM ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Aix Marseille Université ( AMU ), H1, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Calorimeter (particle physics), Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, HERA, 01 natural sciences, law.invention, Nuclear physics, Upgrade, Data acquisition, law, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Collider, Instrumentation, Storage ring
Abstract: General aspects of the H1 detector at the electron-proton storage ring HERA as well as technical descriptions of the magnet, luminosity system, trigger, slow-control, data acquisition and off-line data handling are given. The three major components of the detector, the tracking, calorimeter and muon detectors, will be described in a forthcoming article. The present paper describes the detector that was used from 1992 to the end of 1994. After this a major upgrade of some components was undertaken. Some performance figures from luminosity runs at HERA during 1993 and 1994 are given.
Published: 1997

16. Energy Flow in the Hadronic Final State of Diffractive and Non-Diffractive Deep-Inelastic Scattering at HERA

Author: Aid, S., Zsembery, J., Zuber, K., Zurnedden, M., Zimmer, M., Zomer, F., Zhokin, A., Zarbock, D., Zhang, Z., Wunsch, E., Zacek, J., Yiou, T. P., Wittek, C., G Winter, G., Winde, M., Willard, S., Wilksen, T., Wellisch, H. P., West, L. R., Wegener, D., Wegner, A., Weber, M., Weber, G., Waugh, B., Walther, A., Wagener, M., Wagener, A., Wacker, K., Villet, G., Verrecchia, P., Vazdik, Y., Mechelen, P., Esch, P., Vandenplas, D., Vallee, C., Valkarova, A., Usik, A., Valkar, S., Tutas, J., Uelkes, P., Turnau, J., Truol, P., Thiebaux, C., Thompson, G., Theissen, J., Tchernyshov, V., Tchetchelnitski, S., Stolze, K., Tapprogge, S., Tasevsky, M., Straumann, U., Struczinski, W., Sutton, P., Stier, J., Stiewe, J., Stosslein, U., Steiner, H., Stella, B., Steffen, P., Steinberg, R., Steenbock, M., Squinabol, F., Starosta, R., Spiekermann, J., Spielman, S., Spitzer, H., Specka, A., Soloviev, Y., Solochenko, V., Smith, J. R., Smirnov, P., Sirois, Y., Skillicorn, I. O., Siewert, U., Sell, R., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Seidel, M., Sefkow, F., Schwab, B., Schumann, E., Schroder, V., Schmidt, G., Schoning, A., Semenov, A., Schmidt, D., Schlippe, W., Schleper, P., Schleif, S., Schiek, S., Schacht, P., Sankey, D. P. C., Sahlmann, N., Rybicki, K., Ruter, K., Rusakov, S., Rostovtsev, A., Rouse, F., Royon, C., Rosenbauer, K., Roosen, R., Roloff, H. E., Robmann, P., Robertson, S. M., Rizvi, E., Rietz, M., Riess, S., Riepenhausen, F., Riedlberger, J., Riech, V., Rick, H., Reinshagen, S., Reimer, P., Raupach, F., Radel, G., Prosi, R., Rabbertz, K., Prell, S., Pieuchot, A., Pitzl, D., Phillips, J. P., Perez, E., Pawletta, H., Peppel, E., Patel, G. D., Panitch, A., Pascaud, C., Panaro, E., Palmen, P., Ozerov, D., Obrock, U., Oakden, M., Oberlack, H., Olsson, J. E., Nyberg-Werther, M., Noyes, G. W., Nowak, G., Niggli, H., Nisius, R., Ch. Niedzballa, Niebuhr, C., Niebergall, F., Nicholls, T. C., Nguyen, H. K., Neyret, D., Newton, D., Newman, P. E., Th. Naumann, Naroska, B., Nahnhauer, R., Nagovizin, V., Murin, P., Muller, K., Muller, G., Muller, D., Mroczko, E., Morris, J. V., Moreau, F., Moeck, J., Milstead, D., Mikocki, S., Migliori, A., O Meyer, P., Meyer, H., Meyer, J., Merz, T., Meyer, A., Mehta, A., Meier, K., Maxfield, S. J., Mcmahon, S. J., Mavroidis, T., U Martyn, H., Martyniak, J., Masson, S., Martin, G., Roland Martin, Marshall, R., Martens, J., Marks, J., Maracek, R., Marage, P., Mani, S., Malinovski, E., Magnussen, N., Luke, D., Lubimov, V., Lopez, G. C., Lobo, G., Loch, P., Lohmander, H., Lomas, J. W., List, B., Link, J., Linsel, F., Lipinski, J., Levonian, S., Ch. Ley, Lindstrom, G., Lindstroem, M., Leverenz, C., F Laporte, J., Lebedev, A., Lehner, F., Langenegger, U., Lanius, P., Lange, W., Landon, M. P. J., Lamarche, F., Lander, R., Lacour, D., Laforge, B., Kurzhofer, J., Kurca, T., Kuster, H., Kuhlen, M., Kruger, U., Kruner-Marquis, U., Krucker, D., Krehbiel, H., Krasny, M. W., Kramerkamper, T., Kostka, P., Kotelnikov, S. K., Kolya, S. D., Korbel, V., Korn, M., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Ko, W., Kohler, T., Kohne, J. H., Kolanoski, H., Kole, F., Kaufmann, H. H., Kazarian, S., Johnson, D. P., Johnson, L., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kaschowitz, R., Kathage, U., Katzy, J., Jonsson, L., Johannsen, K., Hutte, M., Hufnagel, H., Ibbotson, M., Itterbeck, H., A Jabiol, M., Jacholkowska, A., Jacobsson, C., Jaffre, M., Janoth, J., Jansen, T., Holtom, T., Horisberger, R., Hoffmann, D., Hoppner, M., Hoeger, K. C., Hladky, J., Hilton, C. D., Hiller, H., Hildesheim, W., Hess, M. F., Herynek, I., Andreev, V., Andrieu, B., D Appuhn, R., Arpagaus, M., Babaev, A., Bahr, J., Ban, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Barth, M., Bassler, U., Beck, H. P., J Behred, H., Belousov, A., Ch. Berger, Bernardi, G., Bernet, R., Bertrand-Coremans, G., Besancon, M., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Blobel, V., Borras, K., Botterweck, F., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Bruncko, D., Brune, C., Buchholz, R., Bungener, L., Burger, J., Busser, F. W., Buniatian, A., Burke, S., Burton, M. J., Buschhorn, G., Campbell, A. J., Carli, T., Charles, F., Charlet, M., Clarke, D., Clegg, A. B., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., C Cousinou, M., Ch. Coutures, Cozzika, G., Criegee, L., Cussans, D. G., Cvach, J., Sylvie DAGORET, Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., Delcourt, B., Del Buono, L., Roeck, A., Wolf, E. A., Dirkmann, M., Dixon, P., Di Nezza, P., Dlugosz, W., Dollfus, C., Dowell, J. D., Dreis, H. B., Droutskoi, A., Duboc, J., Dullmann, D., Dunger, O., Duhm, H., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellison, R. J., Elsen, E., Erdmann, M., Erdmann, W., Evrard, E., Fahr, A. B., Favart, L., Fedotov, A., Feeken, D., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flugge, G., Fomenko, A., Fominykh, B., Forbush, M., Formanek, J., Foster, J. M., Franke, G., Fretwurst, E., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gellrich, A., Genzel, H., Gerhards, R., Glazov, A., Goerlach, U., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Golec-Biernat, K., Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grassler, H., Grassler, R., Greenshaw, T., Griffiths, R., Grindhammer, G., Gruber, A., Gruber, C., Haack, J., Haidt, D., Hajduk, L., Hamon, O., Hampel, M., Hapke, M., Haynes, W. J., Heinzelmann, J., Henderson, R. C. W., Henschel, H., Hudgson, V. L., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: Quantum chromodynamics, Physics, Current quark, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Scattering, Hadron, High Energy Physics::Phenomenology, FOS: Physical sciences, Perturbative QCD, HERA, Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Pomeron, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics
Abstract: An investigation of the hadronic final state in diffractive and non--diffractive deep--inelastic electron--proton scattering at HERA is presented, where diffractive data are selected experimentally by demanding a large gap in pseudo --rapidity around the proton remnant direction. The transverse energy flow in the hadronic final state is evaluated using a set of estimators which quantify topological properties. Using available Monte Carlo QCD calculations, it is demonstrated that the final state in diffractive DIS exhibits the features expected if the interaction is interpreted as the scattering of an electron off a current quark with associated effects of perturbative QCD. A model in which deep--inelastic diffraction is taken to be the exchange of a pomeron with partonic structure is found to reproduce the measurements well. Models for deep--inelastic $ep$ scattering, in which a sizeable diffractive contribution is present because of non--perturbative effects in the production of the hadronic final state, reproduce the general tendencies of the data but in all give a worse description., 22 pages, latex, 6 Figures appended as uuencoded file
Published: 1996

17. Elastic electroproduction of $\rho$ and J/$ \Psi$ mesons at largeQ$^{\star \star}$2 at HERA

Author: Aid, S., Zsembery, J., Zuber, K., Zurnedden, M., Zimmer, M., Zomer, F., Zhokin, A., Zarbock, D., Zhiqing Zhang, Wunsch, E., Zacek, J., Yiou, T. P., Wittek, C., G Winter, G., Winde, M., Willard, S., Wilksen, T., Wellisch, H. P., West, L. R., Wegener, D., Wegner, A., Weber, M., Weber, G., Waugh, B., Walther, A., Wagener, M., Wagener, A., Wacker, K., Villet, G., Verrecchia, P., Vazdik, Y., Mechelen, P., Esch, P., Vandenplas, D., Vallee, C., Valkarova, A., Usik, A., Valkar, S., Tutas, J., Uelkes, P., Turnau, J., Truol, P., Thiebaux, C., Thompson, G., Theissen, J., Tchernyshov, V., Tchetchelnitski, S., Stolze, K., Tapprogge, S., Tasevsky, M., Straumann, U., Struczinski, W., Sutton, P., Stier, J., Stiewe, J., Stosslein, U., Steiner, H., Stella, B., Steffen, P., Steinberg, R., Steenbock, M., Squinabol, F., Starosta, R., Spiekermann, J., Spielman, S., Spitzer, H., Specka, A., Soloviev, Y., Solochenko, V., Smith, J. R., Smirnov, P., Sirois, Y., Skillicorn, I. O., Siewert, U., Sell, R., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Seidel, M., Sefkow, F., Schwab, B., Schumann, E., Schroder, V., Schmidt, G., Schoning, A., Semenov, A., Schmidt, D., Schlippe, W., Schleper, P., Schleif, S., Schiek, S., Schacht, P., Sankey, D. P. C., Sahlmann, N., Rybicki, K., Ruter, K., Rusakov, S., Rostovtsev, A., Rouse, F., Royon, C., Rosenbauer, K., Roosen, R., Roloff, H. E., Robmann, P., Robertson, S. M., Rizvi, E., Rietz, M., Riess, S., Riepenhausen, F., Riedlberger, J., Riech, V., Rick, H., Reinshagen, S., Reimer, P., Raupach, F., Radel, G., Prosi, R., Rabbertz, K., Prell, S., Pieuchot, A., Pitzl, D., Phillips, J. P., Perez, E., Pawletta, H., Peppel, E., Patel, G. D., Panitch, A., Pascaud, C., Panaro, E., Palmen, P., Ozerov, D., Obrock, U., Oakden, M., Oberlack, H., Olsson, J. E., Nyberg-Werther, M., Noyes, G. W., Nowak, G., Niggli, H., Nisius, R., Ch. Niedzballa, Niebuhr, C., Niebergall, F., Nicholls, T. C., Nguyen, H. K., Neyret, D., Newton, D., Newman, P. E., Th. Naumann, Naroska, B., Nahnhauer, R., Nagovizin, V., Murin, P., Muller, K., Muller, G., Muller, D., Mroczko, E., Morris, J. V., Moreau, F., Moeck, J., Milstead, D., Mikocki, S., Migliori, A., O Meyer, P., Meyer, H., Meyer, J., Merz, T., Meyer, A., Mehta, A., Meier, K., Maxfield, S. J., Mcmahon, S. J., Mavroidis, T., U Martyn, H., Martyniak, J., Masson, S., Martin, G., Roland Martin, Marshall, R., Martens, J., Marks, J., Maracek, R., Marage, P., Mani, S., Malinovski, E., Magnussen, N., Luke, D., Lubimov, V., Lopez, G. C., Lobo, G., Loch, P., Lohmander, H., Lomas, J. W., List, B., Link, J., Linsel, F., Lipinski, J., Levonian, S., Ch. Ley, Lindstrom, G., Lindstroem, M., Leverenz, C., F Laporte, J., Lebedev, A., Lehner, F., Langenegger, U., Lanius, P., Lange, W., Landon, M. P. J., Lamarche, F., Lander, R., Lacour, D., Laforge, B., Kurzhofer, J., Kurca, T., Kuster, H., Kuhlen, M., Kruger, U., Kruner-Marquis, U., Krucker, D., Krehbiel, H., Krasny, M. W., Kramerkamper, T., Kostka, P., Kotelnikov, S. K., Kolya, S. D., Korbel, V., Korn, M., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Ko, W., Kohler, T., Kohne, J. H., Kolanoski, H., Kole, F., Kaufmann, H. H., Kazarian, S., Johnson, D. P., Johnson, L., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kaschowitz, R., Kathage, U., Katzy, J., Jonsson, L., Johannsen, K., Hutte, M., Hufnagel, H., Ibbotson, M., Itterbeck, H., A Jabiol, M., Jacholkowska, A., Jacobsson, C., Jaffre, M., Janoth, J., Jansen, T., Holtom, T., Horisberger, R., Hoffmann, D., Hoppner, M., Hoeger, K. C., Hladky, J., Hilton, C. D., Hiller, H., Hildesheim, W., Hess, M. F., Herynek, I., Andreev, V., Andrieu, B., D Appuhn, R., Arpagaus, M., Babaev, A., Bahr, J., Ban, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Barth, M., Bassler, U., Beck, H. P., J Behred, H., Belousov, A., Ch. Berger, Bernardi, G., Bernet, R., Bertrand-Coremans, G., Besancon, M., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Blobel, V., Borras, K., Botterweck, F., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Bruncko, D., Brune, C., Buchholz, R., Bungener, L., Burger, J., Busser, F. W., Buniatian, A., Burke, S., Burton, M. J., Buschhorn, G., Campbell, A. J., Carli, T., Charles, F., Charlet, M., Clarke, D., Clegg, A. B., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., C Cousinou, M., Ch. Coutures, Cozzika, G., Criegee, L., Cussans, D. G., Cvach, J., Sylvie DAGORET, Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., Delcourt, B., Del Buono, L., Roeck, A., Wolf, E. A., Dirkmann, M., Dixon, P., Di Nezza, P., Dlugosz, W., Dollfus, C., Dowell, J. D., Dreis, H. B., Droutskoi, A., Duboc, J., Dullmann, D., Dunger, O., Duhm, H., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellison, R. J., Elsen, E., Erdmann, M., Erdmann, W., Evrard, E., Fahr, A. B., Favart, L., Fedotov, A., Feeken, D., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flugge, G., Fomenko, A., Fominykh, B., Forbush, M., Formanek, J., Foster, J. M., Franke, G., Fretwurst, E., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gellrich, A., Genzel, H., Gerhards, R., Glazov, A., Goerlach, U., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Golec-Biernat, K., Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grassler, H., Grassler, R., Greenshaw, T., Griffiths, R., Grindhammer, G., Gruber, A., Gruber, C., Haack, J., Haidt, D., Hajduk, L., Hamon, O., Hampel, M., Hapke, M., Haynes, W. J., Heinzelmann, J., Henderson, R. C. W., Henschel, H., Hudgson, V. L., Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Kerec, Hélène, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1996

18. A search for leptoquarks at HERA

Author: S. Aid, V. Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Bähr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, R. Barschke, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, G. Bernardi, R. Bernet, G. Bertrand-Coremans, M. Besançon, R. Beyer, P. Biddulph, P. Bispham, J.C. Bizot, V. Blobel, K. Borras, F. Botterweck, V. Boudry, A. Braemer, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, M.J. Burton, G. Buschhorn, A.J. Campbell, T. Carli, F. Charles, M. Charlet, D. Clarke, A.B. Clegg, B. Clerbaux, S. Cocks, J.G. Contreras, C. Cormack, J.A. Coughlan, A. Courau, M.-C. Cousinou, Ch. Coutures, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, C.L. Davis, B. Delcourt, L. Del Buono, A. De Roeck, E.A. De Wolf, M. Dirkmann, P. Dixon, P. Di Nezza, W. Dlugosz, C. Dollfus, J.D. Dowell, H.B. Dreis, A. Droutskoi, J. Duboc, D. Düllmann, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, R.J. Ellison, E. Elsen, M. Erdmann, W. Erdmann, E. Evrard, A.B. Fahr, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, B. Fominykh, M. Forbush, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, F. Gaede, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, A. Glazov, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, K. Golec-Biernat, B. Gonzalez-Pineiro, I. Gorelov, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, R. Griffiths, G. Grindhammer, A. Gruber, C. Gruber, J. Haack, D. Haidt, L. Hajduk, O. Hamon, M. Hampel, M. Hapke, W.J. Haynes, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, W. Hildesheim, K.H. Hiller, C.D. Hilton, J. Hladký, K.C. Hoeger, M. Höppner, D. Hoffmann, T. Holtom, R. Horisberger, V.L. Hudgson, M. Hütte, H. Hufnagel, M. Ibbotson, H. Itterbeck, M.-A. Jabiol, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Jönsson, K. Johannsen, D.P. Johnson, L. Johnson, H. Jung, P.I.P. Kalmus, M. Kander, D. Kant, R. Kaschowitz, U. Kathage, J. Katzy, H.H. Kaufmann, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, W. Ko, T. Köhler, J.H. Köhne, H. Kolanoski, F. Kole, S.D. Kolya, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, U. Krüner-Marquis, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, D. Lacour, B. Laforge, F. Lamarche, R. Lander, M.P.J. Landon, W. Lange, U. Langenegger, P. Lanius, J.-F. Laporte, A. Lebedev, F. Lehner, C. Leverenz, S. Levonian, Ch. Ley, G. Lindström, M. Lindstroem, J. Link, F. Linsel, J. Lipinski, B. List, G. Lobo, P. Loch, H. Lohmander, J.W. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, G. Martin, R. Martin, H.-U. Martyn, J. Martyniak, S. Masson, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, T. Merz, A. Meyer, H. Meyer, J. Meyer, P.-O. Meyer, A. Migliori, S. Mikocki, D. Milstead, J. Moeck, F. Moreau, J.V. Morris, E. Mroczko, D. Müller, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, H. Niggli, R. Nisius, G. Nowak, G.W. Noyes, M. Nyberg-Werther, M. Oakden, H. Oberlack, U. Obrock, J.E. Olsson, D. Ozerov, P. Palmen, E. Panaro, A. Panitch, C. Pascaud, G.D. Patel, H. Pawletta, E. Peppel, E. Perez, J.P. Phillips, A. Pieuchot, D. Pitzl, G. Pope, S. Prell, R. Prosi, K. Rabbertz, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, H. Rick, V. Riech, J. Riedlberger, F. Riepenhausen, S. Riess, M. Rietz, E. Rizvi, S.M. Robertson, P. Robmann, H.E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, N. Sahlmann, D.P.C. Sankey, P. Schacht, S. Schiek, S. Schleif, P. Schleper, W. von Schlippe, D. Schmidt, G. Schmidt, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, F. Sefkow, M. Seidel, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, J.R. Smith, V. Solochenko, Y. Soloviev, A. Specka, J. Spiekermann, S. Spielman, H. Spitzer, F. Squinabol, R. Starosta, M. Steenbock, P. Steffen, R. Steinberg, H. Steiner, B. Stella, J. Stier, J. Stiewe, U. Stößlein, K. Stolze, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, J. Theissen, C. Thiebaux, G. Thompson, P. Truöl, J. Turnau, J. Tutas, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Vallée, D. Vandenplas, P. Van Esch, P. Van Mechelen, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, A. Walther, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, H.P. Wellisch, L.R. West, T. Wilksen, S. Willard, M. Winde, G.-G. Winter, C. Wittek, E. Wünsch, T.P. Yiou, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, M. Zimmer, F. Zomer, J. Zsembery, K. Zuber, M. zurNedden, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), H1, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Coupling, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Yukawa potential, FOS: Physical sciences, HERA, Type (model theory), 01 natural sciences, Standard Model, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Leptoquark, High Energy Physics::Experiment, 010306 general physics, Lepton
Abstract: A search for leptoquarks at HERA was performed in H1 using 1994 $e^+ p$ data corresponding to an integrated luminosity of about $3 \pb^{-1}$. Single leptoquarks were searched for in direct positron-quark fusion processes taking into account possible decays into lepton-quark pairs of either the first, the second, or the third generation. No significant deviation from the Standard Model predictions is found in the various final states studied and mass dependent exclusion limits are derived on the Yukawa couplings of the leptoquarks. Compared with earlier results from an analysis of $e^-p$ data, exclusion limits are considerably improved for leptoquarks which could be produced via $e^+$-{\it valence~quark} fusion. For leptoquarks with lepton flavour conserving couplings, masses up to $275 \GeV$ (depending on the leptoquark type) are excluded for coupling values larger than $\sqrt{ 4 \pi \alpha_{em}}$. For leptoquarks with lepton flavour violating couplings, masses up to $225 \GeV$ are excluded for the first time in a direct search for couplings with leptons of the second or third generation larger than $\sqrt{ 4 \pi \alpha_{em}}$. Fourteen possible combinations of couplings are studied and stringent exclusion limits comparable or better than any existing direct or indirect limits are obtained for each leptoquark type., Comment: 16 pages, latex, 4 figures appended as uuencoded file
Published: 1996

19. Photoproduction of d$^{\star\pm}$ mesons in electron-proton collisions at HERA

Author: Aid, S., Zsembery, J., Zuber, K., Zurnedden, M., Zimmer, M., Zomer, F., Zhokin, A., Zarbock, D., Zhiqing Zhang, Wunsch, E., Zacek, J., Yiou, T. P., Wittek, C., G Winter, G., Winde, M., Willard, S., Wilksen, T., Wellisch, H. P., West, L. R., Wegener, D., Wegner, A., Weber, M., Weber, G., Waugh, B., Walther, A., Wagener, M., Wagener, A., Wacker, K., Villet, G., Verrecchia, P., Vazdik, Y., Mechelen, P., Esch, P., Vandenplas, D., Vallee, C., Valkarova, A., Usik, A., Valkar, S., Tutas, J., Uelkes, P., Turnau, J., Truol, P., Thiebaux, C., Thompson, G., Theissen, J., Tchernyshov, V., Tchetchelnitski, S., Stolze, K., Tapprogge, S., Tasevsky, M., Straumann, U., Struczinski, W., Sutton, P., Stier, J., Stiewe, J., Stosslein, U., Steiner, H., Stella, B., Steffen, P., Steinberg, R., Steenbock, M., Squinabol, F., Starosta, R., Spiekermann, J., Spielman, S., Spitzer, H., Specka, A., Soloviev, Y., Solochenko, V., Smith, J. R., Smirnov, P., Sirois, Y., Skillicorn, I. O., Siewert, U., Sell, R., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Seidel, M., Sefkow, F., Schwab, B., Schumann, E., Schroder, V., Schmidt, G., Schoning, A., Semenov, A., Schmidt, D., Schlippe, W., Schleper, P., Schleif, S., Schiek, S., Schacht, P., Sankey, D. P. C., Sahlmann, N., Rybicki, K., Ruter, K., Rusakov, S., Rostovtsev, A., Rouse, F., Royon, C., Rosenbauer, K., Roosen, R., Roloff, H. E., Robmann, P., Robertson, S. M., Rizvi, E., Rietz, M., Riess, S., Riepenhausen, F., Riedlberger, J., Riech, V., Rick, H., Reinshagen, S., Reimer, P., Raupach, F., Radel, G., Prosi, R., Rabbertz, K., Prell, S., Pieuchot, A., Pitzl, D., Phillips, J. P., Perez, E., Pawletta, H., Peppel, E., Patel, G. D., Panitch, A., Pascaud, C., Panaro, E., Palmen, P., Ozerov, D., Obrock, U., Oakden, M., Oberlack, H., Olsson, J. E., Nyberg-Werther, M., Noyes, G. W., Nowak, G., Niggli, H., Nisius, R., Ch. Niedzballa, Niebuhr, C., Niebergall, F., Nicholls, T. C., Nguyen, H. K., Neyret, D., Newton, D., Newman, P. E., Th. Naumann, Naroska, B., Nahnhauer, R., Nagovizin, V., Murin, P., Muller, K., Muller, G., Muller, D., Mroczko, E., Morris, J. V., Moreau, F., Moeck, J., Milstead, D., Mikocki, S., Migliori, A., O Meyer, P., Meyer, H., Meyer, J., Merz, T., Meyer, A., Mehta, A., Meier, K., Maxfield, S. J., Mcmahon, S. J., Mavroidis, T., U Martyn, H., Martyniak, J., Masson, S., Martin, G., Roland Martin, Marshall, R., Martens, J., Marks, J., Maracek, R., Marage, P., Mani, S., Malinovski, E., Magnussen, N., Luke, D., Lubimov, V., Lopez, G. C., Lobo, G., Loch, P., Lohmander, H., Lomas, J. W., List, B., Link, J., Linsel, F., Lipinski, J., Levonian, S., Ch. Ley, Lindstrom, G., Lindstroem, M., Leverenz, C., F Laporte, J., Lebedev, A., Lehner, F., Langenegger, U., Lanius, P., Lange, W., Landon, M. P. J., Lamarche, F., Lander, R., Lacour, D., Laforge, B., Kurzhofer, J., Kurca, T., Kuster, H., Kuhlen, M., Kruger, U., Kruner-Marquis, U., Krucker, D., Krehbiel, H., Krasny, M. W., Kramerkamper, T., Kostka, P., Kotelnikov, S. K., Kolya, S. D., Korbel, V., Korn, M., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Ko, W., Kohler, T., Kohne, J. H., Kolanoski, H., Kole, F., Kaufmann, H. H., Kazarian, S., Johnson, D. P., Johnson, L., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kaschowitz, R., Kathage, U., Katzy, J., Jonsson, L., Johannsen, K., Hutte, M., Hufnagel, H., Ibbotson, M., Itterbeck, H., A Jabiol, M., Jacholkowska, A., Jacobsson, C., Jaffre, M., Janoth, J., Jansen, T., Holtom, T., Horisberger, R., Hoffmann, D., Hoppner, M., Hoeger, K. C., Hladky, J., Hilton, C. D., Hiller, H., Hildesheim, W., Hess, M. F., Herynek, I., Andreev, V., Andrieu, B., D Appuhn, R., Arpagaus, M., Babaev, A., Bahr, J., Ban, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Barth, M., Bassler, U., Beck, H. P., J Behred, H., Belousov, A., Ch. Berger, Bernardi, G., Bernet, R., Bertrand-Coremans, G., Besancon, M., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Blobel, V., Borras, K., Botterweck, F., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Bruncko, D., Brune, C., Buchholz, R., Bungener, L., Burger, J., Busser, F. W., Buniatian, A., Burke, S., Burton, M. J., Buschhorn, G., Campbell, A. J., Carli, T., Charles, F., Charlet, M., Clarke, D., Clegg, A. B., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., C Cousinou, M., Ch. Coutures, Cozzika, G., Criegee, L., Cussans, D. G., Cvach, J., Sylvie DAGORET, Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., Delcourt, B., Del Buono, L., Roeck, A., Wolf, E. A., Dirkmann, M., Dixon, P., Di Nezza, P., Dlugosz, W., Dollfus, C., Dowell, J. D., Dreis, H. B., Droutskoi, A., Duboc, J., Dullmann, D., Dunger, O., Duhm, H., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellison, R. J., Elsen, E., Erdmann, M., Erdmann, W., Evrard, E., Fahr, A. B., Favart, L., Fedotov, A., Feeken, D., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flugge, G., Fomenko, A., Fominykh, B., Forbush, M., Formanek, J., Foster, J. M., Franke, G., Fretwurst, E., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gellrich, A., Genzel, H., Gerhards, R., Glazov, A., Goerlach, U., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Golec-Biernat, K., Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grassler, H., Grassler, R., Greenshaw, T., Griffiths, R., Grindhammer, G., Gruber, A., Gruber, C., Haack, J., Haidt, D., Hajduk, L., Hamon, O., Hampel, M., Hapke, M., Haynes, W. J., Heinzelmann, J., Henderson, R. C. W., Henschel, H., Hudgson, V. L., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1996

20. Elastic photoproduction of $\rho^{0}$ mesons at HERA

Author: Aid, S., Zsembery, J., Zuber, K., Zurnedden, M., Zimmer, M., Zomer, F., Zhokin, A., Zarbock, D., Zhiqing Zhang, Wunsch, E., Zacek, J., Yiou, T. P., Wittek, C., G Winter, G., Winde, M., Willard, S., Wilksen, T., Wellisch, H. P., West, L. R., Wegener, D., Wegner, A., Weber, M., Weber, G., Waugh, B., Walther, A., Wagener, M., Wagener, A., Wacker, K., Villet, G., Verrecchia, P., Vazdik, Y., Mechelen, P., Esch, P., Vandenplas, D., Vallee, C., Valkarova, A., Usik, A., Valkar, S., Tutas, J., Uelkes, P., Turnau, J., Truol, P., Thiebaux, C., Thompson, G., Theissen, J., Tchernyshov, V., Tchetchelnitski, S., Stolze, K., Tapprogge, S., Tasevsky, M., Straumann, U., Struczinski, W., Sutton, P., Stier, J., Stiewe, J., Stosslein, U., Steiner, H., Stella, B., Steffen, P., Steinberg, R., Steenbock, M., Squinabol, F., Starosta, R., Spiekermann, J., Spielman, S., Spitzer, H., Specka, A., Soloviev, Y., Solochenko, V., Smith, J. R., Smirnov, P., Sirois, Y., Skillicorn, I. O., Siewert, U., Sell, R., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Seidel, M., Sefkow, F., Schwab, B., Schumann, E., Schroder, V., Schmidt, G., Schoning, A., Semenov, A., Schmidt, D., Schlippe, W., Schleper, P., Schleif, S., Schiek, S., Schacht, P., Sankey, D. P. C., Sahlmann, N., Rybicki, K., Ruter, K., Rusakov, S., Rostovtsev, A., Rouse, F., Royon, C., Rosenbauer, K., Roosen, R., Roloff, H. E., Robmann, P., Robertson, S. M., Rizvi, E., Rietz, M., Riess, S., Riepenhausen, F., Riedlberger, J., Riech, V., Rick, H., Reinshagen, S., Reimer, P., Raupach, F., Radel, G., Prosi, R., Rabbertz, K., Prell, S., Pieuchot, A., Pitzl, D., Phillips, J. P., Perez, E., Pawletta, H., Peppel, E., Patel, G. D., Panitch, A., Pascaud, C., Panaro, E., Palmen, P., Ozerov, D., Obrock, U., Oakden, M., Oberlack, H., Olsson, J. E., Nyberg-Werther, M., Noyes, G. W., Nowak, G., Niggli, H., Nisius, R., Ch. Niedzballa, Niebuhr, C., Niebergall, F., Nicholls, T. C., Nguyen, H. K., Neyret, D., Newton, D., Newman, P. E., Th. Naumann, Naroska, B., Nahnhauer, R., Nagovizin, V., Murin, P., Muller, K., Muller, G., Muller, D., Mroczko, E., Morris, J. V., Moreau, F., Moeck, J., Milstead, D., Mikocki, S., Migliori, A., O Meyer, P., Meyer, H., Meyer, J., Merz, T., Meyer, A., Mehta, A., Meier, K., Maxfield, S. J., Mcmahon, S. J., Mavroidis, T., U Martyn, H., Martyniak, J., Masson, S., Martin, G., Roland Martin, Marshall, R., Martens, J., Marks, J., Maracek, R., Marage, P., Mani, S., Malinovski, E., Magnussen, N., Luke, D., Lubimov, V., Lopez, G. C., Lobo, G., Loch, P., Lohmander, H., Lomas, J. W., List, B., Link, J., Linsel, F., Lipinski, J., Levonian, S., Ch. Ley, Lindstrom, G., Lindstroem, M., Leverenz, C., F Laporte, J., Lebedev, A., Lehner, F., Langenegger, U., Lanius, P., Lange, W., Landon, M. P. J., Lamarche, F., Lander, R., Lacour, D., Laforge, B., Kurzhofer, J., Kurca, T., Kuster, H., Kuhlen, M., Kruger, U., Kruner-Marquis, U., Krucker, D., Krehbiel, H., Krasny, M. W., Kramerkamper, T., Kostka, P., Kotelnikov, S. K., Kolya, S. D., Korbel, V., Korn, M., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Ko, W., Kohler, T., Kohne, J. H., Kolanoski, H., Kole, F., Kaufmann, H. H., Kazarian, S., Johnson, D. P., Johnson, L., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kaschowitz, R., Kathage, U., Katzy, J., Jonsson, L., Johannsen, K., Hutte, M., Hufnagel, H., Ibbotson, M., Itterbeck, H., A Jabiol, M., Jacholkowska, A., Jacobsson, C., Jaffre, M., Janoth, J., Jansen, T., Holtom, T., Horisberger, R., Hoffmann, D., Hoppner, M., Hoeger, K. C., Hladky, J., Hilton, C. D., Hiller, H., Hildesheim, W., Hess, M. F., Herynek, I., Andreev, V., Andrieu, B., D Appuhn, R., Arpagaus, M., Babaev, A., Bahr, J., Ban, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Barth, M., Bassler, U., Beck, H. P., J Behred, H., Belousov, A., Ch. Berger, Bernardi, G., Bernet, R., Bertrand-Coremans, G., Besancon, M., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Blobel, V., Borras, K., Botterweck, F., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Bruncko, D., Brune, C., Buchholz, R., Bungener, L., Burger, J., Busser, F. W., Buniatian, A., Burke, S., Burton, M. J., Buschhorn, G., Campbell, A. J., Carli, T., Charles, F., Charlet, M., Clarke, D., Clegg, A. B., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., C Cousinou, M., Ch. Coutures, Cozzika, G., Criegee, L., Cussans, D. G., Cvach, J., Sylvie DAGORET, Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., Delcourt, B., Del Buono, L., Roeck, A., Wolf, E. A., Dirkmann, M., Dixon, P., Di Nezza, P., Dlugosz, W., Dollfus, C., Dowell, J. D., Dreis, H. B., Droutskoi, A., Duboc, J., Dullmann, D., Dunger, O., Duhm, H., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellison, R. J., Elsen, E., Erdmann, M., Erdmann, W., Evrard, E., Fahr, A. B., Favart, L., Fedotov, A., Feeken, D., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flugge, G., Fomenko, A., Fominykh, B., Forbush, M., Formanek, J., Foster, J. M., Franke, G., Fretwurst, E., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gellrich, A., Genzel, H., Gerhards, R., Glazov, A., Goerlach, U., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Golec-Biernat, K., Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grassler, H., Grassler, R., Greenshaw, T., Griffiths, R., Grindhammer, G., Gruber, A., Gruber, C., Haack, J., Haidt, D., Hajduk, L., Hamon, O., Hampel, M., Hapke, M., Haynes, W. J., Heinzelmann, J., Henderson, R. C. W., Henschel, H., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Kerec, Hélène, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Hadron, HERA, 01 natural sciences, 7. Clean energy, Helicity, Lower energy, High Energy Physics - Experiment, Angular distribution, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Invariant mass, Nuclear Experiment, 010306 general physics, Energy (signal processing)
Abstract: The cross section for the elastic photoproduction of \r0 mesons ($\gamma p \to \rho^0 p$) has been measured with the H1 detector at HERA for two average photon-proton centre-of-mass energies of 55 and 187 GeV. TheFcenterline lower energy point was measured by observing directly the $\rho^{0}$ decay giving a cross section of $9.1\pm 0.9 (\stat)\pm 2.5 (\syst) \mu$b. The logarithmic slope parameter of the differential cross section, ${\rm d}\sigma/{\rm d}t$, is found to be $10.9 \pm 2.4 (\stat) \pm 1.1 (\syst) $GeV$^{-2}$. The \r0 decay polar angular distribution is found to be consistent with s-channel helicity conservation. The higher energy cross section was determined from analysis of the lower part of the hadronic invariant mass spectrum of diffractive photoproduction and found to be $13.6\pm 0.8 (\stat)\pm 2.4 (\syst) \mu$b., Comment: 25 pages, latex, 9 Figures appended as uuencoded file
Published: 1996

21. Leptoquarks and Compositeness Scales from a Contact Interaction Analysis of Deep Inelastic $e^\pm \, p$ Scattering at HERA

Author: J. Feltesse, S. Levonian, M. Wagener, M. Korn, K. Flamm, J. Žáček, R. Buchholz, R. M. Martin, David Milstead, G. Weber, U. Straumann, A. Meyer, P. A. Smirnov, Steve McMahon, P. I. P. Kalmus, J. Riedlberger, S. Mani, H. P. Beck, A. Braemer, V. Korbel, J. Martens, Th. Naumann, K. Rosenbauer, Stephen Burke, Gianfranco Sciacca, Murrough Landon, Armen Vartapetian, M. Oakden, H. Duhm, J. V. Morris, G. Schmidt, J. Janoth, A. E. Wright, F. Kole, Dusan Bruncko, U. Stößlein, F. Linsel, J. Heatherington, J. Garvey, F. Zomer, D. Newton, S. M. Robertson, P. Lanius, Markus Seidel, A. Glazov, V. Tchernyshov, E. Gabathuler, B. Naroska, F. Ferrarotto, Daniel Pitzl, A. Rostovtsev, H. Meyer, S. Kermiche, K. Gabathuler, A. Buniatian, L. Del Buono, A. M. Fomenko, H. Genzel, Volker Blobel, V. Andreev, G. Thompson, V.L. Hudgson, V. Lubimov, Stephen Maxfield, K. C. Hoeger, T.C. Nicholls, M. Hütte, S. K. Kotelnikov, A. Droutskoi, C. Keuker, D. Wegener, W.J. Haynes, M. Forbush, T. Greenshaw, L. Hajduk, M. J. Burton, J.P. Phillips, M. David, Klaus Rabbertz, V. Riech, S. Reinshagen, S. Tapprogge, H. Ehrlichmann, D. Düllmann, L. R. West, W.D. Dau, J. B. Dainton, R. Maraček, L. N. Shtarkov, Benno List, Didier Lacour, G. Pope, H. Itterbeck, W. von Schlippe, J. Stiewe, P. Van Mechelen, H. Henschel, S. Spielman, A. B. Clegg, R. Rylko, Andrew Mehta, Yves Sirois, I. R. Kenyon, T. Köhler, M. W. Krasny, S. Eichenberger, H. J. Behrend, J.C. Bizot, M. Goldberg, A. Panitch, T. Merz, M. Hapke, F. Lehner, D. Lüke, H. Spitzer, Christophe Royon, Paul Richard Newman, Grzegorz Nowak, C. Jacobsson, P. Van Esch, M. Arpagaus, E. Wünsch, V. Efremenko, Dave Sankey, Claus Kleinwort, Barbara Clerbaux, G. Villet, Pierre Marage, J. Lipinski, J. Bähr, Winston Ko, P. Baranov, G. Franke, N. Gogitidze, C. Pascaud, Peter Schleper, E. Evrard, K. Rüter, C. Niebuhr, W. Hildesheim, A. Courau, K. Stephens, E. Peppel, T. Krämerkämper, Jean-Arcady Meyer, C. A. Meyer, G. D. Patel, Guenter Eckerlin, André Schöning, M. Flieser, R. Gerhards, S. Mikocki, S. Willard, Marc Besancon, D. Goldner, J. Stier, Y. Soloviev, J. W. Lomas, A. Gruber, A. Migliori, G. Martin, I. Sheviakov, J. M. Link, Peter Schacht, G. C. Lopez, A.S. Belousov, Sergey Rusakov, David Schmidt, B. Delcourt, J. Marks, Y. Vazdik, P. Truöl, U. Krüger, Daniel Johnson, R. Nisius, A. Gellrich, R. Roosen, P. E. Reimer, C. Cormack, C. Leverenz, G. Bertrand-Coremans, K. Daum, M. Winde, A. Lebedev, S. Egli, Gregorio Bernardi, V. Boudry, P. Goritchev, P. Uelkes, J. Martyniak, L. Johnson, S. Dagoret, F. Lamarche, O. Hamon, L. Goerlich, M. Rietz, D. Haidt, Anton Babaev, G. G. Winter, M. Nyberg-Werther, B. Fominykh, M. Charlet, P. Loch, K. Rybicki, L. Criegee, C. Thiebaux, J. Ebert, J. Spiekermann, V. Solochenko, U. Kathage, R. Starosta, G. Cozzika, J. Strachota, T. R. Ebert, R. Bernet, Christoph Grab, H. E. Roloff, F. Eisele, V. Brisson, Yong Ban, N. Magnussen, J. Ferencei, V I. Shekelyan, K. Wacker, R. Steinberg, Wolfram Erdmann, Eram Rizvi, G. Heinzelmann, M. Fleischer, Emmanuelle Perez, G. Lobo, J. Formánek, Stefan Valkar, E. Mroczko, M. Gebauer, F. Sefkow, J. R. Smith, E. Eisenhandler, P. Verrecchia, P. Steffen, Ch. Ley, A. Fedotov, Günter Flügge, T. P. Yiou, M. zurNedden, N. Sahlmann, E. Schuhmann, Eckhart Fretwurst, H. Küster, Hannes Jung, D. Neyret, T. Mavroidis, D. Vandenplas, Alexander Zhokin, Leif J. Jönsson, Hermann Kolanoski, D. Clarke, John A Coughlan, G. Knies, Horst Oberlack, A. Wagener, S. Schiek, P. Biddulph, V. Schröder, R. Nahnhauer, E. Barrelet, David Cussans, C. Kiesling, A. De Roeck, A. J. Campbell, B. Schwab, Pavel Murin, H. Grässler, M. Ibbotson, H. Lohmander, A. Wegner, M. A. Jabiol, H. H. Kaufmann, Eckhard Elsen, J. Duboc, B. Stella, E. A. De Wolf, Ch. Berger, Karlheinz Meier, H. K. Nguyen, I. V. Gorelov, K. Müller, P. Bispham, T. Kurča, D. Zarbock, H. P. Wellisch, U. Bassler, Martin Erdmann, C. Wittek, L. Büngener, H. Hufnagel, R. Grässler, Ch. Coutures, W. Struczinski, J. M. Foster, Max Weber, D. Feeken, E. Panaro, J. Kurzhöfer, V. Nagovizin, I. Herynek, S. Aid, R. Barschke, U. Obrock, C.D. Hilton, J.G. Contreras, P. Ribarics, R. Felst, K. Zuber, R. Eichler, J. Haack, Laurent Favart, T. Carli, G. W. Noyes, J. Cvach, Ch. Niedzballa, C. Dollfus, G. Müller, F. Niebergall, I. O. Skillicorn, H. B. Dreis, Carl R. Brune, M. Barth, F. Rouse, D. Mercer, Ulrich Goerlach, R. Marshall, S. Masson, Dirk Krücker, H. Krehbiel, Zhen Zhang, G. Buschhorn, D. Ozerov, H. U. Martyn, Matthias Klein, A. Usik, M. Jaffre, J. E. Olsson, W. Bartel, A. Walther, F. W. Büsser, W. Zimmermann, W. Braunschweig, R. Sell, S. Kazarian, U. Siewert, U. Krüner-Marquis, M. Zimmer, Jean-Francois Laporte, Frank Raupach, N. Wulff, P. Kasselmann, K. H. Hiller, R. C. W. Henderson, J. Tutas, J. D. Burger, R. Prosi, C. Vallée, M. Höppner, K. Stolze, S. Prell, R. D. Appuhn, B. Gonzalez-Pineiro, G. Siegmon, R. L. Lander, R. Kaschowitz, J. H. Köhne, Roland Horisberger, A. Valkárová, R. Beyer, S. Riess, F. Moreau, J. Hladký, J. D. Dowell, G. Lindström, C. Gruber, E. Malinovski, M. Kuhlen, A. Jacholkowska, P. Hill, J. Bán, G. Grindhammer, S. D. Kolya, D. Kant, Kerstin Borras, A. Semenov, F. Brasse, T. Jansen, F. Charles, J. Katzy, H. Rick, G. Rädel, M. F. Hess, P. Kostka, M. Hampel, B. Kuznik, R. J. Ellison, Ph. Huet, J. Turnau, Ch. Pichler, S. Schleif, M. Steenbock, J. P. Sutton, P. Di Nezza, B. Andrieu, Wolfgang Lange, J. Gayler, Peter Robmann, O. Dünger, and F. Botterweck
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Scattering, Physics beyond the Standard Model, Hadron, High Energy Physics::Phenomenology, Form factor (quantum field theory), FOS: Physical sciences, HERA, Standard Model, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics::Experiment, Lepton
Abstract: A contact interaction analysis is presented to search for new phenomena beyond the Standard Model in deep inelastic $e^\pm p \rightarrow e^\pm \, hadrons$ scattering. The data are collected with the H1 detector at HERA and correspond to integrated luminosities of $0.909 \ {\rm pb}^{-1}$ and $2.947 \ {\rm pb}^{-1}$ for electron and positron beams, respectively. The differential cross sections $d\sigma / dQ^2$ are measured in the $Q^2$ range bet\-ween $160 \ \GeV^2$ and $20,000 \ \GeV^2$. The absence of any significant deviation from the Standard Model prediction is used to constrain the couplings and masses of new leptoquarks and to set limits on electron--quark compositeness scales and on the radius of light quarks., Comment: 16 pages, latex, 2 figures appended as uuencoded file
Published: 1995

22. Inclusive parton cross sections in photoproduction and photon structure

Author: T. Ahmed, S. Aid, V. Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Baehr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, G. Bernardi, R. Bernet, G. Bertrand-Coremans, M. Besançon, R. Beyer, P. Biddulph, P. Bispham, J.C. Bizot, V. Blobel, K. Borras, F. Botterweck, V. Boudry, A. Braemer, F. Brasse, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, M. Burton, G. Buschhorn, A.J. Campbell, T. Carli, F. Charles, M. Charlet, D. Clarke, A.B. Clegg, B. Clerbaux, M. Colombo, J.G. Contreras, C. Cormack, J.A. Coughlan, A. Courau, Ch. Coutures, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, B. Delcourt, L. Del Buono, A. De Roeck, E.A. De Wolf, P. Di Nezza, C. Dollfus, J.D. Dowell, H.B. Dreis, A. Droutskoi, J. Duboc, D. Düllmann, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, H. Ehrlichmann, S. Eichenberger, R. Eichler, F. Eisele, E. Eisenhandler, R.J. Ellison, E. Elsen, M. Erdmann, W. Erdmann, E. Evrard, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, B. Fominykh, M. Forbush, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, K. Gamerdinger, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, B. Gonzalez-Pineiro, I. Gorelov, P. Goritchev, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, G. Grindhammer, A. Gruber, C. Gruber, J. Haack, D. Haidt, L. Hajduk, O. Hamon, M. Hampel, E.M. Hanlon, M. Hapke, W.J. Haynes, J. Heatherington, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, W. Hildesheim, P. Hill, K.H. Hiller, C.D. Hilton, J. Hladký, K.C. Hoeger, M. Höppner, R. Horisberger, V.L. Hudgson, Ph. Huet, M. Hütte, H. Hufnagel, M. Ibbotson, H. Itterbeck, M.-A. Jabiol, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Jönsson, D.P. Johnson, L. Johnson, H. Jung, P.I.P. Kalmus, D. Kant, R. Kaschowitz, P. Kasselmann, U. Kathage, J. Katzy, H.H. Kaufmann, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, W. Ko, T. Köhler, J.H. Köhne, H. Kolanoski, F. Kole, S.D. Kolya, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, U. Krüner-Marquis, J.P. Kubenka, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, B. Kuznik, D. Lacour, F. Lamarche, R. Lander, M.P.J. Landon, W. Lange, P. Lanius, J.-F. Laporte, A. Lebedev, C. Leverenz, S. Levonian, Ch. Ley, A. Lindner, G. Lindström, J. Link, F. Linsel, J. Lipinski, B. List, G. Lobo, P. Loch, H. Lohmander, J. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, R. Martin, H.-U. Martyn, J. Martyniak, S. Masson, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, D. Mercer, T. Merz, C.A. Meyer, H. Meyer, J. Meyer, A. Migliori, S. Mikocki, D. Milstead, F. Moreau, J.V. Morris, E. Mroczko, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, R. Nisius, G. Nowak, G.W. Noyes, M. Nyberg-Werther, M. Oakden, H. Oberlack, U. Obrock, J.E. Olsson, D. Ozerov, E. Panaro, A. Panitch, C. Pascaud, G.D. Patel, E. Peppel, E. Perez, J.P. Phillips, Ch. Pichler, A. Pieuchot, D. Pitzl, G. Pope, S. Prell, R. Prosi, K. Rabbertz, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, P. Ribarics, H. Rick, V. Riech, J. Riedlberger, S. Riess, M. Rietz, E. Rizvi, S.M. Robertson, P. Robmann, H.E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, R. Rylko, N. Sahlmann, S.G. Salesch, E. Sanchez, D.P.C. Sankey, P. Schacht, S. Schiek, P. Schleper, W. von Schlippe, C. Schmidt, D. Schmidt, G. Schmidt, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, A. Schwind, F. Sefkow, M. Seidel, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, H. Shooshtari, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, J.R. Smith, V. Solochenko, Y. Soloviev, J. Spiekermann, S. Spielman, H. Spitzer, R. Starosta, M. Steenbock, P. Steffen, R. Steinberg, B. Stella, K. Stephens, J. Stier, J. Stiewe, U. Stösslein, K. Stolze, J. Strachota, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, V. Tchernyshov, C. Thiebaux, G. Thompson, P. Truöl, J. Turnau, J. Tutas, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Esch, P. Van Mechelen, A. Vartapetian, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, I.W. Walker, A. Walther, G. Weber, M. Weber, D. Wegener, A. Wegner, H.P. Wellisch, L.R. West, S. Willard, M. Winde, G.-G. Winter, C. Wittek, A.E. Wright, E. Wünsch, N. Wulff, T.P. Yiou, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, M. Zimmer, W. Zimmermann, F. Zomer, K. Zuber, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Starita, Sabine
Subjects: Nuclear and High Energy Physics, Particle physics, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Parton, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, Momentum, High Energy Physics - Experiment (hep-ex), Factorization, 0103 physical sciences, Bibliography, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Nuclear Experiment, Quantum chromodynamics, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, Gluon, High Energy Physics::Experiment
Abstract: Photoproduction of 2-jet events is studied with the H1 detector at HERA. Parton cross sections are extracted from the data by an unfolding method using leading order parton-jet correlations of a QCD generator. The gluon distribution in the photon is derived in the fractional momentum range $0.04\le x_\gamma \le 1$ at the average factorization scale $75$ GeV$^2$., Comment: 23 pages, latex, 10 figures appended as uuencoded file, misprint corrected
Published: 1995

23. A Direct Determination of the Gluon Density in the Proton at Low x

Author: C. A. Meyer, H. U. Martyn, A. Gruber, L. Goerlich, P. E. Reimer, Paul Richard Newman, C. Jacobsson, C. Vallée, C. Cormack, Alan Campbell, J. Feltesse, G. G. Winter, K. Rüter, C. Niebuhr, S. Egli, R. D. Appuhn, G. Grindhammer, Ch. Ley, P. Steffen, Max Klein, R. Buchholz, E. Evrard, D. Goldner, Y. Soloviev, Stefan Tapprogge, J. H. Köhne, R. Maraček, J-P. Meyer, M. W. Krasny, David Milstead, P. A. Smirnov, K. Meier, A. Wagener, K. Stephens, E. Peppel, W. von Schlippe, J. Žáček, B. Delcourt, D. Zarbock, H. P. Wellisch, Max Weber, U. Kathage, E. Malinovski, M. Kuhlen, T. Merz, M. Ibbotson, T. Carli, G. Lindström, C. Gruber, E. Eisenhandler, Christoph Grab, I. Sheviakov, H. K. Nguyen, I. V. Gorelov, K. Müller, C. Leverenz, A. Fedotox, R. Grässler, Ch. Coutures, W. Struczinski, V.L. Hudgson, E. Gabathuler, I. R. Kenyon, K. Gabathuler, A. Buniatian, J. Stiewe, K. C. Hoeger, T.C. Nicholls, J. Spiekermann, O. Hamon, K. Rosenbauer, I. O. Skillicorn, D. Wegener, W.J. Haynes, R. Roosen, J. Martens, H. Spitzer, U. Krüger, S. Dagoret, R. Rylko, Andrew Mehta, N. Gogitidze, Armen Vartapetian, R. Nahnhauer, E. Barrelet, S. Mani, H. P. Beck, David Cussans, Stephen Burke, R. Nisius, V. Riech, M. Hapke, R. J. Ellison, L. R. West, S. Spielman, T. Köhler, F. Kole, U. Stößlein, E. A. De Wolf, Ch. Berger, D. Schmidt, Martin Erdmann, G. Thompson, D. Düllmann, J. Ferencei, V I. Shekelyan, K. Wacker, R. Steinberg, V. Efremenko, C. Wittek, U. Obrock, L. Büngener, D. Kant, Kerstin Borras, A. Semenov, F. Niebergall, V. Korbel, A. Droutskoi, H. J. Behrend, J.C. Bizot, M. Goldberg, G. Bertrand-Coremans, S. Schiek, Peter Robmann, M. zur Nedden, W.D. Dau, P. Goritchev, J. B. Dainton, R. Bernet, M. Jaffre, J. E. Olsson, W. Bartel, I. Herynek, Wolfram Erdmann, G. C. Lopez, S. Mikocki, G. Cozzika, F. Eisele, A. Wegner, R. Gerhards, H. E. Roloff, J. Ebert, R. C. W. Henderson, F. Brasse, J. R. Smith, J.P. Phillips, Stefan Valkar, D. Neyret, F. W. Büsser, E. Panaro, J. Kurzhöfer, V. Nagovizin, S. Eichenberger, W. Braunschweig, T. Mavroidis, A. Meyer, Hannes Jung, Alexander Zhokin, V. Boudry, R. Eichler, Leif J. Jönsson, C. Thiebaux, S. J. Maxfield, K. Zuber, Anton Babaev, R. Sell, S. Kazarian, J. Bähr, Gianfranco Sciacca, F. Zomer, A. Lebedev, M. Oakden, J. Strachota, L. Del Buono, L. Criegee, J. Cvach, Ch. Niedzballa, G. W. Noyes, U. Siewert, U. Krüner-Marquis, O. Dünger, M. Rietz, D. Haidt, M. Zimmer, H. Lohmander, D. Feeken, F. Botterweck, Dusan Bruncko, S. Kermiche, F. Ferrarotto, S. Rusakov, J. Formánek, H. Genzel, H. Ehrlichmann, W. Hildesheim, Yves Sirois, E. Mroczko, M. Gebauer, D. Vandenplas, Eram Rizvi, G. Heinzelmann, S. Willard, J. Lipinski, G. Franke, Zhen Zhang, A. Lindner, J. Janoth, V. Lubimox, M. Fleischer, P. Van Esch, Volker Blobel, Vladimir Andreev, Wolfgang Lange, E. Elsen, C. Keuker, A. Rostovtsev, Claus Kleinwort, M. Winde, H. Küster, A. Usik, H. Oberlack, P. Uelkes, L. Johnson, Klaus Rabbertz, A. B. Clegg, G. Villet, Pierre Marage, M. Colombo, J. V. Morris, G. Schmidt, A. Courau, Murrough Landon, S. J. McMahon, B. Schwab, J. Duboc, B. Stella, A. E. Wright, N. Wulff, J. W. Lomas, M. Forbush, H. Krehbiel, S. Reinshagen, C. Kiesling, Pavel Murin, V. Brisson, H. Grässler, P. Kasselmann, A. Pieuchot, A. Migliori, G. Buschhorn, G. Müller, D. Ozerov, Carl R. Brune, M. Barth, R. Barschke, M. Höppner, Laurent Favart, C. Dollfus, S. Prell, Daniel Pitzl, D. Lüke, E. Wünsch, F. Rouse, Dave Sankey, H. Itterbeck, P. Van Mechelen, M. Arpagaus, K. Rybicki, Ulrich Goerlach, S. K. Kotelnikov, L. Hajduk, G. D. Patel, H. Meyer, Richard Lander, D.P. Johnson, G. Martin, F. Lamarche, J. P. Sutton, R. D. Martin, Didier Lacour, G. Pope, P. Di Nezza, K. Daum, L. N. Shtarkov, Hermann Kolanoski, D. Clarke, G. Knies, P. Bispham, J. Gayler, John A Coughlan, J. F. Laporte, A. Panitch, G. Nowak, F. Lehner, C. Yoyon, J. Haack, J. Riedlberger, H. B. Dreis, R. Marshall, S. Levonian, Dirk Krücker, S. M. Robertson, M. Wagener, M. Hütte, K. Flamm, P. Verrecchia, A. Braemer, A. Walther, T. Jansen, W. Zimmermann, H. Rick, P. I. P. Kalmus, G. Rädel, V. Solochenko, Yong Ban, N. Magnussen, M. Hampel, B. Kuznik, N. Sahlmann, E. Schuhmann, Ph. Huet, P. Biddulph, M. A. Jabiol, U. Bassler, P. Ribarics, R. Felst, J. M. Foster, Ch. Pichler, S. Schleif, G. Siegmon, P. Baranov, Peter Schleper, R. Beyer, T. Krämerkämper, Marc Besancon, A.S. Belousov, P. Truöl, F. Moreau, J. Hladký, J. D. Dowell, J. Martyniak, B. Fominykh, Emmanuelle Perez, G. Lobo, A. Jacholkowska, H. Hufnagel, K. H. Hiller, C.D. Hilton, J.G. Contreras, J. Tutas, J. D. Burger, R. Prosi, K. Stolze, R. Kaschowitz, M. Nyberg-Werther, Roland Horisberger, A. Valkárová, S. Riess, S. Aid, P. Hill, J. Bán, T. R. Ebert, F. Raupach, D. Mercer, Günter Flügge, B. Gonzalez-Pineiro, T. P. Yiou, S. Masson, F. Charles, J. Katzy, M. F. Hess, P. Loch, J. Turnau, A. De Roeck, M. Steenbock, V. Schröder, H. H. Kaufmann, B. Andrieu, A. Gellrich, Benno List, Barbara Clerbaux, J. M. Link, H. Henschel, T. Kurča, S. D. Kolya, Th. Naumann, H. Duhm, P. Kostka, B. Naroska, Winston Ko, E. Fretwurst, M. David, F. Linsel, Tim Greenshaw, J. Heatherington, D. Newton, C. Pascaud, P. Lanius, Markus Seidel, A. Glazov, V. Tchernyshov, Guenter Eckerlin, André Schöning, M. Korn, G. Weber, U. Straumann, P. Schacht, M. Flieser, G. Bernardi, J. Stier, J. Marks, Y. Vazdik, M. Charlet, R. Starosta, F. Sefkow, J. Garvey, A. M. Fomenko, M. J. Burton, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), H1, and Starita, Sabine
Subjects: Nuclear and High Energy Physics, Proton, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Lattice, Nuclear Theory, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Momentum, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Statistical analysis, 010306 general physics, Nuclear Experiment, Quantum chromodynamics, Physics, Range (particle radiation), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, 3. Good health, Gluon, High Energy Physics::Experiment, Atomic physics
Abstract: A leading order determination of the gluon density in the proton has been performed in the fractional momentum range $1.9 \cdot 10^{-3} < x_{g/p} < 0.18$ by measuring multi-jet events from boson-gluon fusion in deep-inelastic scattering with the H1 detector at the electron-proton collider HERA. This direct determination of the gluon density was performed in a kinematic region previously not accessible. The data show a considerable increase of the gluon density with decreasing fractional momenta of the gluons., 19 pages, latex, 5 figures appended as uuencoded file
Published: 1995
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24. Determination of the strong coupling constant from jet rates in deep inelastic scattering

Author: E. Evrard, F. Kole, T. P. Yiou, U. Bassler, B. Gonzalez-Pineiro, P. Ribarics, Armen Vartapetian, J. Garvey, B. Delcourt, R. Felst, A. M. Fomenko, M. Colombo, C. Leverenz, S. Tapprogge, A. Droutskoi, W.D. Dau, J. B. Dainton, R. L. Lander, Peter Robmann, Murrough Landon, A. E. Wright, C. A. Meyer, K. H. Hiller, H. U. Martyn, L. Del Buono, M. Htte, C. Vallée, A. Gruber, S. Eichenberger, R. Nahnhauer, K. Stephens, E. Peppel, P. E. Reimer, C. Cormack, Alan Campbell, N. Magnussen, R. D. Appuhn, N. Sahlmann, E. Schuhmann, E. Barrelet, David Cussans, M. A. Jabiol, E. A. De Wolf, Ch. Berger, H. Itterbeck, P. Van Mechelen, H. Erlichmann, E. M. Hanlon, C. Niebuhr, S. Aid, G. G. Winter, K. Mller, M. Kuhlen, F. Botterweck, A. Mavroidis, F. Charles, E. Eisenhandler, S. Egli, T. Jansen, G. Grindhammer, M. Nyberg-Werther, P. Steffen, U. Krner-Marquis, G. Cozzika, F. Eisele, D. Goldner, D. Krcker, M. F. Hess, E. Prez, J. Kurzhfer, R. Taylor, E. Snchez, I. Herynek, J.P. Phillips, S. Mani, H. P. Beck, Stephen Burke, O. Hamon, V. Schrder, H. Rick, M. Vecko, C. Gruber, H. Grssler, M. Hampel, B. Kuznik, J. Turnau, M. Korn, R. Starosta, Stephen Maxfield, Hannes Jung, Steve McMahon, S. Levonian, A. Gellrich, D. Mercer, M. Steenbock, Paul Richard Newman, Grzegorz Nowak, C. Jacobsson, I. W. Walker, K. Daum, D. Zarbock, Alexander Zhokin, H. P. Wellisch, Ph. Huet, Max Weber, R. J. Ellison, G. Mller, Christoph Grab, Ch. Pichler, S. Prell, G. Weber, U. Straumann, F. Lamarche, M. Wagener, S. Masson, U. Seehausen, F. Sefkow, T. Carli, B. Andrieu, J. Stiewe, A. Lindner, J. Janoth, M. Burton, G. Knies, P. Trul, A. B. Clegg, R. Rylko, K. Rosenbauer, K. Flamm, V. Chernyshov, M. Hppner, S. Schiek, G. Flgge, Andrew Mehta, D. Kant, J. Feltesse, T. R. Ebert, F. Linsel, Hermann Kolanoski, K. C. Hoeger, T.C. Nicholls, G. Siegmon, R. Kaschowitz, K. Johannsen, P. Verrecchia, Christophe Royon, O. Dnger, D. Clarke, Tim Greenshaw, Roland Horisberger, F. Zomer, A. Fedotov, M. Jaffré, Volker Blobel, Kerstin Borras, A. Semenov, N. Gogitidze, J. Haack, C. Keuker, Zhen Zhang, J. Heatherington, H. H. Kaufmann, S. Riess, G. Thompson, R. Beyer, K. Rter, U. Kathage, John A Coughlan, Max Klein, Horst Oberlack, V. Riech, D. Newton, F. Moreau, S. Valkr, P. Baranov, E. Malinovskii, B. Naroska, P. I. P. Kalmus, I. O. Skillicorn, H. B. Dreis, Peter Schleper, J. Buerger, J. D. Dowell, G C. Lpez, Yu. Solovev, J. Formnek, E. Gabathuler, C. Schmidt, J. P. Sutton, P. Di Nezza, Winston Ko, M. Hapke, F. Brasse, F W. Bsser, P. Hill, J. Bán, B. Stella, J. Khne, T. Krmerkmper, R. Buchholz, Daniel Pitzl, A. Jacholkowska, C. Pascaud, B. Schwab, A. Braemer, V. Lubimov, E. Wnsch, P. Lanius, E. Mroczko, Guenter Eckerlin, V. Brisson, Wolfgang Lange, Marc Besancon, David Milstead, Benno List, A.S. Belousov, P. A. Smirnov, K. Meier, H. J. Behrend, J.C. Bizot, Barbara Clerbaux, Mikhail Danilov, Judith Katzy, Carl R. Brune, M. Barth, M. Goldberg, Markus Seidel, A. De Roeck, R. Gerhards, S. K. Kotelnikov, J. Ebert, L. Hajduk, H. Henschel, R. C. W. Henderson, Laurent Favart, R. Roosen, L. N. Shtarkov, J. Martyniak, J. Tutas, A. Panitch, C. Dollfus, F. Rouse, L. Jnsson, R. Prosi, J. Hladky, Ch. Ley, J. Riedlberger, Ulrich Goerlach, T. Kurča, S. M. Robertson, A. Usik, H. Bergstein, B. Fominykh, Yves Sirois, Peter Loch, Wolfram Erdmann, D. Schmidt, T. Khler, R. D. Martin, A. Wegner, Didier Lacour, A. Wagener, Eckhart Fretwurst, S. D. Kolya, Th. Naumann, Peter Schacht, U. Stsslein, G. Pope, H. Duhm, J. Lipinski, G. Franke, G. Villet, J. E. Olsson, H. K. Nguyen, I. V. Gorelov, Gregorio Bernardi, V. Boudry, T. Ahmed, Pierre Marage, Anton Babaev, C. Thiebaux, Ch. Coutures, W. Struczinski, W. Bartel, J. Strachota, R. Grssler, H. Hufnagel, J. M. Foster, E. Deffur, M. Savitsky, K. Zuber, P. Goritchev, P. Kostka, a A. Akhundov, V L. Hudgson, A. Courau, S. Kermiche, E. Panaro, J. Cvach, D. Dllmann, C.D. Hilton, J.G. Contreras, R. Bernet, K. Gamerdinger, J. Duboc, D. Neyret, W. Braunschweig, M. David, R. Eichler, H. E. Roloff, R. Sell, J. P. Kubenka, S. Kazarian, M. Flieser, U. Siewert, E. Rizvi, G. W. Noyes, J. Stier, Y. Vazdik, M. Zimmer, Jean-Francois Laporte, P. Murn, H. Kster, G. Lindstrm, H. Lohmander, S. Dagoret, A. Valkrov, D. Feeken, J. Ferencei, V I. Shekelyan, W. Hildesheim, K. Wacker, R. Steinberg, Frank Raupach, Dusan Bruncko, I. R. Kenyon, H. Spitzer, F. Ferrarotto, H. Genzel, N. Wulff, J. Spiekermann, P. Kasselmann, P. Van Esch, E. Elsen, J. Marks, G. Rdel, A. Rostovtsev, Claus Kleinwort, S. Willard, U P. Krger, Martin Erdmann, U. Obrock, F. Niebergall, V. Korbel, Vladimir Andreev, L. Grlich, M. Winde, P. Uelkes, L. Johnson, G. Bertrand-Coremans, L. Criegee, S. Reinshagen, C. Kiesling, S. Rusakov, M. Gebauer, V. Nagovitsin, M. Arpagaus, K. Gabathuler, K. Rybicki, A. Buniatian, D. Wegener, W.J. Haynes, J. Zcek, L. R. West, M. W. Krasny, H. Krehbiel, G. Buschhorn, V. Efremenko, A. Walther, W. Zimmermann, S. Mikocki, J. Baehr, A. Schning, J. Gayler, D. Lke, R. Marshall, Dave Sankey, G. D. Patel, H. Meyer, D.P. Johnson, J. V. Morris, G. Schmidt, M. Forbush, A. Schwind, R. Maraček, J-P. Meyer, W. von Schlippe, A. Lebedev, T. Merz, M. Ibbotson, M. Rietz, D. Haidt, G. Heinzelmann, M. Fleischer, M. Oakden, H. Shooshtari, R. Nisius, J. R. Smith, L. Buengener, I. Shevyakov, J. Martens, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Annihilation, Proton, 010308 nuclear & particles physics, Perturbative QCD, Parton, HERA, Jet (particle physics), Deep inelastic scattering, 01 natural sciences, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics
Abstract: Jet rates in deep inelastic electron proton scattering are studied with the H1 detector at HERA for momentum transfers squared between 10 and 4000 GeV 2 . It is shown that they can be quantitatively described by perturbative QCD in next to leading order making use of the parton densities of the proton and with the strong coupling constant α s as a free parameter. The measured value, α s ( M Z 2 ) = 0.123 ± 0.018, is in agreement both with determinations from e + e − annihilation at LEP using the same observable and with the world average.
Published: 1995

25. First measurement of the deep-inelastic structure of proton diffraction

Author: T. Ahmed, S. Aid, V. Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Baehr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, G. Bernardi, R. Bernet, G. Bertrand-Coremans, M. Besançon, R. Beyer, P. Biddulph, P. Bispham, J.C. Bizot, V. Blobel, K. Borras, F. Botterweck, V. Boudry, A. Braemer, F. Brasse, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, M. Burton, G. Buschhorn, A.J. Campbell, T. Carli, F. Charles, D. Clarke, A.B. Clegg, B. Clerbaux, M. Colombo, J.G. Contreras, C. Cormack, J.A. Coughlan, A. Courau, Ch. Coutures, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, E. Deffur, B. Delcourt, L. Del Buono, A. De Roeck, E.A. De Wolf, P. Di Nezza, C. Dollfus, J.D. Dowell, H.B. Dreis, A. Droutskoi, J. Duboc, D. Düllmann, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, H. Ehrlichmann, S. Eichenberger, R. Eichler, F. Eisele, E. Eisenhandler, R.J. Ellison, E. Elsen, M. Erdmann, W. Erdmann, E. Evrard, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, M. Forbush, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, K. Gamerdinger, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, B. Gonzalez-Pineiro, I. Gorelov, P. Goritchev, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, G. Grindhammer, A. Gruber, C. Gruber, J. Haack, D. Haidt, L. Hajduk, O. Hamon, M. Hampel, E.M. Hanlon, M. Hapke, W.J. Haynes, J. Heatherington, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, W. Hildesheim, P. Hill, K.H. Hiller, C.D. Hilton, J. Hladký, K.C. Hoeger, M. Höppner, R. Horisberger, V.L. Hudgson, Ph. Huet, M. Hütte, H. Hufnagel, M. Ibbotson, H. Itterbeck, M.-A. Jabiol, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Jönsson, D.P. Johnson, L. Johnson, H. Jung, P.I.P. Kalmus, D. Kant, R. Kaschowitz, P. Kasselmann, U. Kathage, J. Katzy, H.H. Kaufmann, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, W. Ko, T. Köhler, J.H. Köhne, H. Kolanoski, F. Kole, S.D. Kolva, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, U. Krüner-Marquis, J.P. Kubenka, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, B. Kuznik, D. Lacour, F. Lamarche, R. Lander, M.P.J. Landon, W. Lange, P. Lanius, J.-F. Laporte, A. Lebedev, C. Leverenz, S. Levonian, Ch. Ley, A. Lindner, G. Lindström, J. Link, F. Linsel, J. Lipinski, B. List, G. Lobo, P. Loch, H. Lohmander, J. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, R. Martin, H.-U. Martyn, J. Martyniak, S. Masson, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, D. Mercer, T. Merz, C.A. Meyer, H. Meyer, J. Meyer, S. Mikocki, D. Milstead, F. Moreau, J.V. Morris, E. Mroczko, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, R. Nisius, G. Nowak, G.W. Noyes, M. Nyberg-Werther, M. Oakden, H. Oberlack, U. Obrock, J.E. Olsson, D. Ozerov, E. Panaro, A. Panitch, C. Pascaud, G.D. Patel, E. Peppel, E. Perez, J.P. Phillips, Ch. Pichler, D. Pitzl, G. Pope, S. Prell, R. Prosi, K. Rabbertz, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, P. Ribarics, H. Rick, V. Riech, J. Riedlberger, S. Riess, M. Rietz, E. Rizvi, S.M. Robertson, P. Robmann, H.E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, R. Rylko, N. Sahlmann, E. Sanchez, D.P.C. Sankey, P. Schacht, S. Schiek, P. Schleper, W. von Schlippe, C. Schmidt, D. Schmidt, G. Schmidt, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, A. Schwind, F. Sefkow, M. Seidel, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, H. Shooshtari, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, J.R. Smith, V. Solochenko, Y. Soloviev, J. Spiekermann, H. Spitzer, R. Starosta, M. Steenbock, P. Steffen, R. Steinberg, B. Stella, K. Stephens, J. Stier, J. Stiewe, U. Stösslein, K. Stolze, J. Strachota, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, R.E. Taylor, V. Tchernyshov, C. Thiebaux, G. Thompson, P. Truöl, J. Turnau, J. Tutas, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Esch, P. Van Mechelen, A. Vartapetian, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, I.W. Walker, A. Walther, G. Weber, M. Weber, D. Wegener, A. Wegner, H.P. Wellisch, L.R. West, S. Willard, M. Winde, G.-G. Winter, C. Wittek, A.E. Wright, E. Wünsch, N. Wulff, T.P. Yiou, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, M. Zimmer, W. Zimmermann, F. Zomer, K. Zuber, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: Diffraction, Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, Scattering, Hadron, FOS: Physical sciences, HERA, Scale invariance, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Cross section (physics), Pomeron, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics
Abstract: A measurement is presented, using data taken with the H1 detector at HERA, of the contribution of diffractive interactions to deep-inelastic electron-proton scattering. The diffractive contribution to the proton structure function is evaluated as a function of the appropriate deep-inelastic scattering variables using a class of deep-inelastic ep scattering events with no hadronic energy flow in an interval of pseudo-rapidity adjacent to the proton beam direction. The dependence of this contribution on x-pomeron is consistent with both a diffractive interpretation and a factorisable ep diffractive cross section. A first measurement of the deep-inelastic structure of the pomeron in the form of a factorised structure function is presented. This structure function is observed to be consistent with scale invariance., 16 pages, latex, including 3 figures
Published: 1995

26. A study of the fragmentation of quarks in $e^-p$ collisions at Hera

Author: J. E. Olsson, W. Bartel, M. Oakden, F. Kole, F. W. Büsser, H. Meyer, W. Braunschweig, S. Levonian, R. Sell, S. Kazarian, U. Krüner-Marquis, M. Wagener, K. C. Hoeger, T.C. Nicholls, U. Siewert, J. V. Morris, M. Zimmer, J. Gayler, S. Aid, L. Del Buono, G. Schmidt, T. Jansen, E. Fretwurst, V. Andreev, H. Rick, Jean-Francois Laporte, G. Rädel, H. Shooshtari, V. Riech, M. Hampel, B. Kuznik, K. Flamm, Ph. Huet, Ch. Pichler, E. Evrard, C. A. Meyer, R. M. Martin, E. Sanchez, M. Hapke, Wolfram Erdmann, A. Gruber, J. H. Köhne, P. Loch, P. I. P. Kalmus, A. Schwind, Ch. Ley, R. Marshall, Dirk Krücker, R. Maraček, H. Ehrlichmann, M. Nyberg-Werther, E. Malinovski, W. von Schlippe, J. Martens, D. Mercer, A. Braemer, K. Daum, R. Roosen, B. Delcourt, H. Krehbiel, M. Kuhlen, R. D. Appuhn, Frank Raupach, C. Niebuhr, G. Thompson, T. Merz, G. Grindhammer, U. Stösslein, M. Höppner, S. Prell, Daniel Johnson, Jean-Arcady Meyer, G. Buschhorn, D. Lüke, S. Masson, J. Martyniak, N. Magnussen, D. Feeken, A. Wagener, G. Bertrand-Coremans, C. Leverenz, V. Lubimov, W. Lange, W. Ko, W. Hildesheim, G. Knies, J. Lipinski, D. Goldner, N. Wulff, D. Ozerov, T. R. Ebert, R. Nahnhauer, O. Hamon, A. Fedotov, K. Rosenbauer, Günter Flügge, Y. Soloviev, G. Franke, R. Gerhards, B. Fominykh, Emmanuelle Perez, E. Wünsch, Dave Sankey, T. P. Yiou, H. Spitzerx, J. R. Smith, A. Gellrich, I. V. Gorelov, K. Müller, G. Pope, R. J. Ellison, Martin Erdmann, P. Verrecchia, V. Schröder, R. Bernet, J. Janoth, U. Obrock, F. Niebergall, C. Schmidt, J. P. Sutton, P. Di Nezza, I. W. Walker, H. K. Nguyen, P. Uelkes, L. Johnson, A. Wegner, G. D. Patel, R. Grässler, Ch. Coutures, W. Struczinski, H. H. Kaufmann, Eckhard Elsen, P. Bispham, S. Schiek, J. Haack, L. N. Shtarkov, J. M. Foster, A. Panitch, I. O. Skillicorn, H. B. Dreis, E. Barrelet, G. Nowak, David Cussans, S. Tapprogge, M. Charlet, R. Starosta, Mario David, F. Lamarche, C. Kiesling, W.D. Dau, H. E. Roloff, J. B. Dainton, V. Solochenko, E. Panaro, J. Kurzhöfer, D. Düllmann, P. Goritchev, F. Sefkow, K. Gamerdinger, Peter Robmann, C. Cormack, E. M. Hanlon, S. Reinshagen, L. Criegee, Christoph Grab, A. De Roeck, M. Colombo, A. Courau, C. Gruber, A. J. Campbell, H. Henschel, H. U. Martyn, Matthias Klein, V. Nagovizin, G. G. Winter, R. Nisius, David Schmidt, T. Mavroidis, Murrough Landon, M. Arpagaus, E. A. De Wolf, Ch. Berger, K. Stephens, K. Rybicki, H. J. Behrend, J.C. Bizot, M. Goldberg, R. Eichler, E. Peppel, Karlheinz Meier, Fabian Zomer, K. Zuber, C. Wittek, G. Lindström, T. Krdmerkämper, A. E. Wright, Christophe Royon, K. Rütter, F. Charles, J. Katzy, J. P. Kubenka, L. Jönson, H. Lohmander, N. Sahlmann, A. Jacholkowska, E. Schuhmann, P. Steffen, J. Formánek, A. Pieuchot, E. Mroczko, M. Gebauer, Benno List, A. Lebedev, S. Egli, T. Kurča, F. Rouse, Armen Vartapetian, Barbara Clerbaux, Zhen Zhang, P. Biddulph, G. Cozzika, F. Eisele, Peter Schacht, G. W. Noyes, G. C. Lopez, S. Willard, M. Rietz, D. Haidt, L. Büngener, M. F. Hess, J. Cvach, Ch. Niedzballa, I. Herynek, O. Dünger, M. Forbush, M. A. Jabiol, A. Walther, Stefan Valkar, C. Pascaud, D. Zarbock, F. Botterweck, H. Itterbeck, P. Van Mechelen, H. P. Wellisch, Max Weber, H. Hufnagel, J. Žáček, I. Sheviakov, M. Flieser, Guenter Eckerlin, André Schöning, T. Carli, W. Zimmermann, Eram Rizvi, A. Rostovtsev, A. Usik, G. Heinzelmann, Gregorio Bernardi, U. Krüger, Hannes Jung, S. Kermiche, J. Spiekermann, Alexander Zhokin, Paul Richard Newman, C. Jacobsson, D. Kant, E. Eisenhandler, Anton Babaev, Kerstin Borras, A. Belousov, Hermann Kolanoski, J. Baehr, J. Stier, D. Clarke, John A Coughlan, U. Bassler, M. Fleischer, C. Vallée, C. Thiebaux, C.D. Hilton, J.G. Contreras, Y. Vazdik, Th. Naumann, J. Turnau, I. R. Kenyon, S. Dagoret, V.L. Hudgson, Stephen Maxfield, J. Stiewe, H. Küster, J. Strachota, J. Feltesse, L. Goerlach, A. Droutskoi, A. Semenov, Horst Oberlack, A. B. Clegg, R. Rylko, Andrew Mehta, N. Gogitidze, K. Gabathuler, A. Buniatian, M. Steenbock, P. Reimer, P. Ribarics, J. Ferencei, D. Wegener, W.J. Haynes, J. Garvey, V I. Shekelyan, J. Link, A. M. Fomenko, R. Felst, G. Lobo, U. Kathage, K. Wacker, R. Steinberg, A. Lindner, H. P. Beck, Stephen Burke, H. Duhm, V. Boudry, R. Lander, R. Buchholz, V. Brisson, P. Baranov, David Milstead, P. A. Smirnov, F. Brasse, L. R. West, S. Spielman, Peter Schleper, M. J. Burton, E. Gabathuler, Dusan Bruncko, B. Andrieu, P. Kostka, B. Naroska, J. Ebert, F. Ferrarotto, H. Genzel, P. Kasselmann, Volker Blobel, S. Mani, Marc Besancon, Sergey Rusakov, P. Truöl, T. Köhler, M. W. Krasny, R. Kaschowitz, D. Neyret, C. Keuker, T. Greenshaw, Roland Horisberger, A. Valkárová, S. Eichenberger, S. Riess, Klaus Rabbertz, J.P. Phillips, J. Riedlberger, S. M. Robertson, V. Efremenko, P. Hill, J. Bán, B. Schwab, P. Van Esch, M. Hütte, Pavel Murin, H. Grässler, Claus Kleinwort, S. Mikocki, M. Ibbotson, B. Gonzalez-Pineiro, R. Barschke, Laurent Favart, C. Dollfus, Steve McMahon, Ulrich Goerlach, J. Duboc, B. Stella, M. Jaffre, G. Müller, V. Korbel, Y. Sirois, Carl R. Brune, M. Barth, M. Seidel, Daniel Pitzl, M. Korn, G. Weber, U. Straumann, S. K. Kotelnikov, J. Marks, L. Hajduk, F. Linsel, J. Heatherington, D. Newton, M. Winde, Didier Lacour, G. Villet, Pierre Marage, P. Lanius, V. Tchernyshov, Y. Ban, J. W. Lomas, A. Migliori, G. Siegmon, R. Beyer, F. Moreau, J. Hladký, J. D. Dowell, S. D. Kolya, K. H. Hiller, R. C. W. Henderson, J. Tutas, J. D. Burger, R. Prosi, K. Stolze, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and H1
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, 010308 nuclear & particles physics, Quark model, High Energy Physics::Phenomenology, FOS: Physical sciences, Parton, HERA, Inelastic scattering, Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pair production, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics
Abstract: Deep inelastic scattering (DIS) events, selected from 1993 data taken by the H1 experiment at HERA, are studied in the Breit frame of reference. The fragmentation function of the quark is compared with those of \ee data. It is shown that certain aspects of the quarks emerging from within the proton in \ep interactions are essentially the same as those of quarks pair-created from the vacuum in \ee annihilation. The measured area, peak position and widthof the fragmentation function show that the kinematic evolution variable, equivalent to the \ee squared centre of mass energy, is in the Breit frame the invariant square of the four-momentum transfer. We comment on the extent to which we have evidence for coherence effects in parton showers., Comment: 18 pages, latex, 7 figures appended as uuencoded file
Published: 1995

27. Measurement of the $e^+$ and $e^-$ induced charged current cross sections at HERA

Author: R. Nahnhauer, Dusan Bruncko, B. Naroska, F. Ferrarotto, T. R. Ebert, E. Barrelet, H. Genzel, David Cussans, K. Rosenbauer, A. Fedotov, Günter Flügge, T. P. Yiou, H. E. Roloff, T. Greenshaw, M. zurNedden, G. Siegmon, E. A. De Wolf, Ch. Berger, Karlheinz Meier, C. Wittek, Leif J. Jönsson, G. Thompson, C. Kiesling, Christophe Royon, L. Büngener, P. Van Esch, K. C. Hoeger, R. Beyer, A. De Roeck, J. P. Sutton, Claus Kleinwort, A. J. Campbell, H. Lohmander, F. Moreau, J. Hladký, P. Loch, D. Düllmann, Peter Robmann, H. Henschel, V. Riech, I. Herynek, H. J. Behrend, J.C. Bizot, M. Goldberg, A. Jacholkowska, F. Linsel, T. Kurča, M. Hapke, P. Verrecchia, E. Bernardi, K. Daum, J. H. Köhne, Winston Ko, S. D. Kolya, S. Schiek, A. Wegner, E. Panaro, J. Kurzhöfer, V. Schröder, V. Nagovizin, Ch. Ley, H. H. Kaufmann, Eckhard Elsen, C. Pascaud, G. W. Noyes, I. Sheviakov, G. Knies, P. Bispham, J. Heatherington, Guenter Eckerlin, H. U. Martyn, Matthias Klein, E. Malinovski, S. Levonian, K. H. Hiller, R. C. W. Henderson, Jean-Arcady Meyer, M. Kuhlen, S. Dagoret, R. Gerhards, Grzegorz Nowak, J. Ferencei, V I. Shekelyan, K. Rüter, C. Niebuhr, K. Wacker, R. Steinberg, D. Newton, C. Jacobsson, G. Cozzika, F. Eisele, G. Bertrand-Coremans, M. Wagener, G. Grindhammer, J. Tutas, O. Dünger, A. Wagener, F. Botterweck, J. Haack, P. E. Reimer, C. Cormack, I. O. Skillicorn, H. B. Dreis, Th. Naumann, M. Hütte, J.P. Phillips, Stefan Valkar, K. Flamm, R. Roosen, J. D. Burger, S. Aid, R. Prosi, H. Duhm, H. K. Nguyen, I. V. Gorelov, K. Müller, J. V. Morris, L. Criegee, S. Reinshagen, Hannes Jung, Alexander Zhokin, R. M. Martin, G. G. Winter, M. Höppner, S. Prell, U. Krüner, D. Goldner, H. Spitzer, J. Martyniak, G. Schmidt, J. Feltesse, P. Steffen, R. Grässler, Ch. Coutures, W. Struczinski, E. Gabathuler, P. Lanius, Y. Soloviev, J. M. Foster, P. I. P. Kalmus, E. Evrard, M. Colombo, K. Stolze, P. Kostka, J. Formánek, Murrough Landon, K. Zuber, Markus Seidel, A. Glazov, V. Tchernyshov, B. Fominykh, E. Mroczko, M. Gebauer, U. Kathage, A. Braemer, A. Schöning, J. Janoth, D. Zarbock, H. P. Wellisch, V. L. Hudgson, A. E. Wright, Max Weber, D. Kant, C. A. Meyer, Emmanuelle Perez, G. Lobo, T. Carli, Paul Newman, R. J. Ellison, J. Cvach, Ch. Niedzballa, V. Lubimov, J. Žáček, J. Garvey, D. Vandenplas, B. Delcourt, M. David, V. Brisson, P. Di Nezza, M. Forbush, Kerstin Borras, D. Mercer, A. Gruber, Volker Blobel, R. Eichler, H. Itterbeck, P. Van Mechelen, A. Gellrich, M. Korn, H. Krehbiel, A. Semenov, T. Jansen, A. M. Fomenko, J. D. Dowell, C. Leverenz, K. Rybicki, C. Keuker, A. Pieuchot, Eckhart Fretwurst, K. Gabathuler, B. Gonzalez-Pineiro, Daniel Johnson, A. Buniatian, M. Arpagaus, Stephen Maxfield, F. Lamarche, Wolfgang Lange, Klaus Rabbertz, O. Hamon, M. Flieser, J. Stiewe, H. Rick, G. Rädel, A. B. Clegg, R. Rylko, Andrew Mehta, L. N. Shtarkov, D. Wegener, W.J. Haynes, J. Stier, L. Goerlich, Wolfram Erdmann, M. J. Burton, N. Gogitidze, J. Gayler, J. Marks, Y. Vazdik, G. Weber, M. Hampel, B. Kuznik, R. Buchholz, A. Panitch, Christoph Grab, David Milstead, Hermann Kolanoski, Ph. Huet, L.R. West, D. Clarke, D. Lüke, F. Lehner, R. L. Lander, U. Bassler, G. Buschhorn, S. Masson, S. Spielman, U. Straumann, D. Ozerov, T. Köhler, M. W. Krasny, Ch. Pichler, John A Coughlan, Martin Erdmann, S. Schleif, P. A. Smirnov, Horst Oberlack, E. Wünsch, F. Charles, J. Katzy, Dave Sankey, U. Obrock, H. Hufnagel, M. F. Hess, K. Stephens, E. Peppel, F. Niebergall, J. Duboc, B. Stella, P. Ribarics, V. Efremenko, R. Felst, D. Feeken, W. Hildesheim, J. Ebert, M. Charlet, Peter Schacht, G. C. Lopez, C.D. Hilton, J.G. Contreras, R. Starosta, J. Turnau, V. Korbel, M. Steenbock, S. Mikocki, G. Müller, G. D. Patel, U. Krüner-Marquis, V. Boudry, S. Willard, Anton Babaev, F. Brasse, V. Solochenko, C. Thiebaux, Armen Vartapetian, J. Strachota, F. Sefkow, B. Andrieu, Carl R. Brune, M. Barth, G. Martin, David Schmidt, Yong Ban, P. Baranov, B. Schwab, R. Kaschowitz, N. Magnussen, Roland Horisberger, A. Valkárová, Pavel Murin, Peter Schleper, H. Grässler, N. Sahlmann, M. Winde, M. Ibbotson, A. Lebedev, S. Egli, S. Riess, T. Krämerkämper, M. Rietz, E. Schuhmann, Benno List, J. Spiekermann, P. Uelkes, L. Johnson, A. Rostovtsev, A. Droutskoi, Marc Besancon, Barbara Clerbaux, D. Haidt, P. Biddulph, R. Barschke, A.S. Belousov, Sergey Rusakov, P. Hill, J. Bán, M. A. Jabiol, Laurent Favart, C. Dollfus, P. Truöl, J. Riedlberger, Eram Rizvi, F. Rouse, G. Heinzelmann, Ulrich Goerlach, T. C. Nicholls, M. Fleischer, H. Küster, J. Martens, F. Kole, J. M. Link, U. Stößlein, S. Eichenberger, J. Bähr, S. Mani, H. P. Beck, S. Tapprogge, W.D. Dau, J. B. Dainton, Stephen Burke, C. Vallée, R. D. Appuhn, R. Marshall, Dirk Krücker, R. Bernet, A. Walther, W. Zimmermann, G. Lindström, C. Gruber, P. Goritchev, D. Neyret, T. Mavroidis, F. Zomer, L. Del Buono, V. Andreev, H. Ehrlichmann, Yves Sirois, J. Lipinski, G. Franke, Frank Raupach, S. M. Robertson, N. Wulff, P. Kasselmann, M. Jaffre, J. E. Olsson, W. Bartel, F. W. Büsser, W. Braunschweig, R. Sell, I. R. Kenyon, S. Kazarian, U. Siewert, M. Zimmer, Jean-Francois Laporte, Zhen Zhang, A. Usik, A. Meyer, Gianfranco Sciacca, M. Oakden, H. Meyer, S. Kermiche, R. Nisius, Daniel Pitzl, J. R. Smith, E. Eisenhandler, R. Maraček, W. von Schlippe, T. Merz, S. K. Kotelnikov, L. Hajduk, Didier Lacour, G. Pope, G. Villet, Pierre Marage, A. Courau, J. W. Lomas, A. Migliori, Steve McMahon, and M. Nyberg-Werther
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), Nuclear Theory, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, High Energy Physics - Experiment, Nuclear physics, Transverse plane, High Energy Physics - Experiment (hep-ex), High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), Charged current
Abstract: The cross sections for the charged current processes ${e^{-}p}\rightarrow{\nu_e+hadrons}$ and, for the first time, ${e^{+}p}\rightarrow{\overline{\nu}_e+hadrons}$ are measured at HERA for transverse momenta larger than 25 GeV., Comment: 21 pages, latex, 10 figures appended as uuencoded file
Published: 1995
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28. Observation of hard processes in rapidity gap events in γp interactions at HERA

Author: R. Beyer, V. Lubimov, F. Moreau, J. Hladký, J. D. Dowell, M. Colombo, A. Jacholkowska, Murrough Landon, S. D. Kolya, A. E. Wright, Mikhail Danilov, L. N. Shtarkov, V. Droutskoi, R. Roosen, I. Sheviakov, J. Martyniak, Frank Raupach, K. Rosenbauer, J. M. Foster, E. Malinovski, I. R. Kenyon, A. Panitch, B. Fominykh, R. Nahnhauer, K. C. Hoeger, V. Riech, J. Martens, Peter Robmann, H. Itterbeck, P. Van Mechelen, N. Wulff, M. Kuhlen, M. Savitsky, G. Thompson, A. Lebedev, S. Egli, M. Rietz, D. Haidt, H. Spitzer, G. Heinzelmann, H. Küster, Emmanuelle Perez, P. Kasselmann, G. Grindhammer, H. U. Martyn, Matthias Klein, F. Kole, E. Barrelet, David Cussans, K. Zuber, K. Johannsen, D. Lüke, T. Jansen, U. Krüger, Christophe Royon, M. Nyberg-Werther, S. Dagoret, I.O. Skillicorni, M. Hapke, D. Düllmann, E. A. De Wolf, Ch. Berger, Karlheinz Meier, S. Willard, E. Wünsch, Dave Sankey, G. D. Patel, K. Gabathuler, A. Buniatian, Eckhart Fretwurst, J. Cvach, David Schmidt, J. V. Morris, G. Schmidt, M. Forbush, J. Žáček, A. Schwind, D. Wegener, W.J. Haynes, H. Rick, G. Rädel, H. Henschel, H. J. Behrend, J.C. Bizot, M. Goldberg, L. Büngener, Zhen Zhang, D. Kant, Winston Ko, C. Pascaud, J. Ferencei, Kerstin Borras, K. Daum, V I. Shekelyan, S. Levonian, Jean-Arcady Meyer, M. Hampel, B. Kuznik, M. Wagener, Ph. Huet, T. R. Ebert, G. Cozzika, F. Eisele, R. Gerhards, A. Semenov, I. Herynek, Steve McMahon, M. Winde, Stefan Valkar, S. Tapprogge, O. Dünger, Guenter Eckerlin, A. Usik, André Schöning, G. Knies, S. Mani, K. Wacker, R. Steinberg, W.D. Dau, P. Loch, P. Uelkes, L. Johnson, Ch. Pichler, K. Flamm, A. Fedotov, L. R. West, T. Köhler, M. W. Krasny, Hannes Jung, Alexander Zhokin, J. B. Dainton, F. Botterweck, R. M. Martin, S. Schiek, R. Marshall, P. Baranov, R. Bernet, F. Brasse, Dirk Krücker, Peter Schleper, H. P. Beck, Stephen Burke, J. Haack, R. J. Ellison, Günter Flügge, T. P. Yiou, P. I. P. Kalmus, P. E. Reimer, H. E. Roloff, K. Stephens, E. Evrard, Dusan Bruncko, V. Efremenko, Paul Richard Newman, Grzegorz Nowak, C. Jacobsson, T. Krämerkämper, E. Peppel, M. Jaffre, H. Krehbiel, J. E. Olsson, W. Bartel, H. B. Dreis, L. Goerlach, K. H. Hiller, R. C. W. Henderson, B. Naroska, F. Ferrarotto, E. M. Hanlon, H. Genzel, P. Verrecchia, A. Braemer, Leif J. Jönsson, C. Kiesling, G. G. Winter, F. Zomer, A. M. Goodall, A. De Roeck, Marc Besancon, S. Mikocki, Ch. Ley, A.S. Belousov, Wolfram Erdmann, A. J. Campbell, Richard E. Taylor, G. Buschhorn, Sergey Rusakov, F. W. Büsser, P. Truöl, W. Braunschweig, L. Del Buono, J. Garvey, R. Sell, S. Kazarian, J. Tutas, J. D. Burger, T. Greenshaw, V. Schröder, T. Ahmed, B. Delcourt, R. Prosi, C. Vallée, H. H. Kaufmann, Eckhard Elsen, J.P. Phillips, Peter Schacht, G. C. Lopez, U. Stösslein, R. D. Appuhn, P. Steffen, V. Andreev, A. Wagener, C. Leverenz, H. Lohmander, U. Siewert, M. Zimmer, Vincent Boudry, A. M. Fomenko, Jean-Francois Laporte, Wolfgang Lange, P. Van Esch, O. Hamon, U. Krüner-Marquis, H. Hufnagel, S. Aid, D. Feeken, U. Kathage, Claus Kleinwort, G. Villet, Pierre Marage, D. Zarbock, H. P. Wellisch, H. Ehrlichmann, Gregorio Bernardi, Max Weber, H. K. Nguyen, I. V. Gorelov, K. Müller, T. Kurča, T. Carli, H. Bergstein, Th. Naumann, R. Grässler, Ch. Coutures, W. Struczinski, Stephen Maxfield, J. Stiewe, C.D. Hilton, J.G. Contreras, Yves Sirois, A. Wegner, V. Brisson, G. Lindström, C. Gruber, E. Panaro, J. Kurzhöfer, S. Reinshagen, A. Courau, A. B. Clegg, R. Rylko, Andrew Mehta, H. Duhm, N. Gogitidze, V. Nagovizin, Anton Babaev, R. Eichler, J. P. Kubenka, J. Feltesse, C. Thiebaux, J. Strachota, M. Vecko, M. Fleischer, J. Lipinski, G. Franke, D. Mercer, G. W. Noyes, E. Gabathuler, E. Deffur, M. Arpagaus, J. Gayler, R. Starosta, A. Walther, U. Seehausen, J. Ebert, F. Sefkow, B. Schwab, S. Masson, Pavel Murin, H. Grässler, W. Zimmermann, M. Ibbotson, J. Baehr, M. David, E. Sanchez, Benno List, Barbara Clerbaux, Laurent Favart, C. Dollfus, M. Flieser, J. Stier, J. Marks, Y. Vazdik, R. Buchholz, David Milstead, P. A. Smirnov, F. Rouse, Ulrich Goerlach, Daniel Pitzl, M. Höppner, S. Prell, S. K. Kotelnikov, L. Hajduk, R. Kaschowitz, W. Hildesheim, Roland Horisberger, A. Valkárová, Martin Erdmann, S. Riess, A. Lindner, J. Janoth, U. Obrock, F. Niebergall, Didier Lacour, G. Pope, C. Schmidt, J. P. Sutton, Volker Blobel, C. Keuker, P. Di Nezza, P. Hill, J. Bán, F. Charles, M. F. Hess, P. Kostka, J. Turnau, M. Steenbock, B. Andrieu, B. Gonzalez-Pineiro, R. L. Lander, M. Korn, G. Weber, H. Meyer, U. Straumann, S. Kermiche, F. Linsel, J. Heatherington, D. Newton, P. Lanius, Markus Seidel, V. Tchernyshov, V. Korbel, H. Shooshtari, R. Maraček, W. von Schlippe, T. Merz, R. Nisius, J. R. Smith, R. Herma, Armen Vartapetian, E. Eisenhandler, A. Rostovtsev, S. Eichenberger, K. Rüter, C. Niebuhr, D. Goldner, Y. Soloviev, I. W. Walker, K. Rybicki, Christoph Grab, U. Bassler, P. Ribarics, R. Felst, N. Magnussen, N. Sahlmann, E. Schuhmann, P. Biddulph, M. A. Jabiol, C. A. Meyer, A. Gruber, Daniel Johnson, J. Duboc, B. Stella, G. Müller, G. Bertrand-Coremans, P. Goritchev, Carl R. Brune, M. Barth, L. Criegee, K. Gamerdinger, D. Neyret, T. Mavroidis, J. Formánek, M. Gebauer, J. Riedlberger, S. M. Robertson, A. Gellrich, F. Lamarche, Hermann Kolanoski, D. Clarke, John A Coughlan, Horst Oberlack, and G. Siegmon
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Photon, Meson, Scattering, Hadron, Physics::Optics, Elementary particle, HERA, Kinetic energy, Nuclear physics, High Energy Physics::Experiment, Rapidity, Nuclear Experiment
Abstract: Events with no hadronic energy flow in a large interval of pseudo-rapidity in the proton direction are observed in photon-proton interactions at an average centre of mass energy 〈√sγp〉 of 200 GeV These events are interpreted as photon diffractive dissociation. Evidence for hard scattering in photon diffractive dissociation is demonstrated using inclusive single particle spectra, thrust as a function of transverse energy, and the observation of jet production. The data can be described by a Monte Carlo calculation including hard photon-pomeron scattering.
Published: 1995

29. The Gluon Density of the Proton at Low $x$ from a QCD Analysis of $F_2$

Author: S. Aid, V. Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Baehr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, R. Barschke, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, G. Bernardi, R. Bernet, G. Bertrand-Coremans, M. Besançon, R. Beyer, P. Biddulph, P. Bispham, J.C. Bizot, V. Blobel, K. Borras, F. Botterweck, V. Boudry, A. Braemer, F. Brasse, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, M. Burton, G. Buschhorn, A.J. Campbell, T. Carli, F. Charles, M. Charlet, D. Clarke, A.B. Clegg, B. Clerbaux, M. Colombo, J.G. Contreras, C. Cormack, J.A. Coughlan, A. Courau, Ch. Coutures, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, B. Delcourt, L. Del Buono, A. De Roeck, E.A. De Wolf, P. Di Nezza, C. Dollfus, J.D. Dowell, H.B. Dreis, A. Droutskoi, J. Duboc, D. Düllmann, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, H. Ehrlichmann, S. Eichenberger, R. Eichler, F. Eisele, E. Eisenhandler, R.J. Ellison, E. Elsen, M. Erdmann, W. Erdmann, E. Evrard, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, B. Fominykh, M. Forbush, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, K. Gamerdinger, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, B. Gonzalez-Pineiro, I. Gorelov, P. Goritchev, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, G. Grindhammer, A. Gruber, C. Gruber, J. Haack, D. Haidt, L. Hajduk, O. Hamon, M. Hampel, E.M. Hanlon, M. Hapke, W.J. Haynes, J. Heatherington, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, W. Hildesheim, P. Hill, K.H. Hiller, C.D. Hilton, J. Hladký, K.C. Hoeger, M. Höppner, R. Horisberger, V.L. Hudgson, Ph. Huet, M. Hütte, H. Hufnagel, M. Ibbotson, H. Itterbeck, M.-A. Jabiol, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Jönsson, D.P. Johnson, L. Johnson, H. Jung, P.I.P. Kalmus, D. Kant, R. Kaschowitz, P. Kasselmann, U. Kathage, J. Katzy, H.H. Kaufmann, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, W. Ko, T. Köhler, J.H. Köhne, H. Kolanoski, F. Kole, S.D. Kolya, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, U. Krüner-Marquis, J.P. Kubenka, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, B. Kuznik, D. Lacour, F. Lamarche, R. Lander, M.P.J. Landon, W. Lange, P. Lanius, J.-F. Laporte, A. Lebedev, C. Leverenz, S. Levonian, Ch. Ley, A. Lindner, G. Lindström, J. Link, F. Linsel, J. Lipinski, B. List, G. Lobo, P. Loch, H. Lohmander, J. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, R. Martin, H.-U. Martyn, J. Martyniak, S. Masson, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, D. Mercer, T. Merz, C.A. Meyer, H. Meyer, J. Meyer, A. Migliori, S. Mikocki, D. Milstead, F. Moreau, J.V. Morris, E. Mroczko, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, R. Nisius, G. Nowak, G.W. Noyes, M. Nyberg-Werther, M. Oakden, H. Oberlack, U. Obrock, J.E. Olsson, D. Ozerov, E. Panaro, A. Panitch, C. Pascaud, G.D. Patel, E. Peppel, E. Perez, J.P. Phillips, Ch. Pichler, A. Pieuchot, D. Pitzl, G. Pope, S. Prell, R. Prosi, K. Rabbertz, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, P. Ribarics, H. Rick, V. Riech, J. Riedlberger, S. Riess, M. Rietz, E. Rizvi, S.M. Robertson, P. Robmann, H.E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, R. Rylko, N. Sahlmann, E. Sanchez, D.P.C. Sankey, P. Schacht, S. Schiek, P. Schleper, W. von Schlippe, C. Schmidt, D. Schmidt, G. Schmidt, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, A. Schwind, F. Sefkow, M. Seidel, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, H. Shooshtari, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, J.R. Smith, V. Solochenko, Y. Soloviev, J. Spiekermann, S. Spielman, H. Spitzer, R. Starosta, M. Steenbock, P. Steffen, R. Steinberg, B. Stella, K. Stephens, J. Stier, J. Stiewe, U. Stösslein, K. Stolze, J. Strachota, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, V. Tchernyshov, C. Thiebaux, G. Thompson, P. Truöl, J. Turnau, J. Tutas, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Esch, P. Van Mechelen, A. Vartapetian, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, I.W. Walker, A. Walther, G. Weber, M. Weber, D. Wegener, A. Wegner, H.P. Wellisch, L.R. West, S. Willard, M. Winde, G.-G. Winter, C. Wittek, A.E. Wright, E. Wünsch, N. Wulff, T.P. Yiou, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, M. Zimmer, W. Zimmermann, F. Zomer, K. Zuber, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), H1, and Starita, Sabine
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Proton, 010308 nuclear & particles physics, High Energy Physics::Lattice, Structure function, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, 01 natural sciences, High Energy Physics - Experiment, Gluon, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nucleon, Scaling
Abstract: We present a QCD analysis of the proton structure function $F_2$ measured by the H1 experiment at HERA, combined with data from previous fixed target experiments. The gluon density is extracted from the scaling violations of $F_2$ in the range $2\cdot 10^{-4}, Comment: 17 pages, latex2e, 5 figures appended as uuencoded file, hep number included
Published: 1995
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30. A measurement of the proton structure function <tex>F_{2}$</tex> (x, <tex>Q^{**}2)$</tex>

Author: H. U. Martyn, Matthias Klein, C. Niebuhr, Wolfram Erdmann, L. Criegee, T. Ahmed, M. Hppner, V. Andreev, D. Goldner, L. Grlich, R. Bernet, L. Jnsson, M. Colombo, H. E. Roloff, L. Del Buono, F W. Bsser, I. W. Walker, Murrough Landon, A. E. Wright, M. Kuhlen, K. Rybicki, G. Grindhammer, Yves Sirois, Paul Richard Newman, Grzegorz Nowak, G. Mller, C. Jacobsson, Christoph Grab, U. Seehausen, J. Kurzhfer, F. Botterweck, E. Snchez, P. Trul, H. Lohmander, G. Bertrand-Coremans, R. Kaschowitz, G. Franke, A. Wegner, a A. Akhundov, E. Panaro, W. Hildesheim, R. Eichler, J. P. Kubenka, G. W. Noyes, A. Walther, H. Itterbeck, P. Van Mechelen, J. V. Morris, S. Prell, H. Erlichmann, P. E. Reimer, W. Zimmermann, S. Riess, C. Cormack, E. M. Hanlon, O. Hamon, Armen Vartapetian, J. Baehr, V. Lubimov, T. Jansen, P. Verrecchia, Roland Horisberger, M. Nyberg-Werther, G. Heinzelmann, G. G. Winter, S. Willard, K. Daum, M. Forbush, A. Rostovtsev, R. J. Ellison, H. H. Kaufmann, Jan Hladky, I. Shevyakov, P. Steffen, P. Goritchev, T. R. Ebert, A. Droutskoi, C. Schmidt, H. Rick, N. Magnussen, J. P. Sutton, P. Di Nezza, M. Winde, P. Uelkes, L. Johnson, Ch. Ley, A. Schwind, N. Sahlmann, E. Mroczko, M. Gebauer, A. Fedotov, G. Knies, Eckhard Elsen, V. Nagovitsin, K. Gamerdinger, U. Kathage, E. Schuhmann, V. Chernyshov, M. Steenbock, H. Hufnagel, P. Hill, P. Robmann, J. Bán, H. Grssler, J. Khne, J. Duboc, D. Neyret, S. Schiek, M. Hampel, B. Kuznik, Ph. Huet, S. Kermiche, S. Aid, J. Buerger, C. Kiesling, Wolfgang Lange, A. Lindner, J. Janoth, D. Dllmann, C.D. Hilton, E. Malinovskii, J.G. Contreras, B. Stella, J. Gayler, S. Eichenberger, I. R. Kenyon, T. Krmerkmper, L. N. Shtarkov, Dave Sankey, J. Haack, V. Brisson, A. De Roeck, A. J. Campbell, Richard E. Taylor, Mikhail Danilov, K. Gabathuler, A. Buniatian, D. Wegener, D. Krcker, W.J. Haynes, J. Formnek, A. Wagener, R. Roosen, I. O. Skillicorn, D. Zarbock, H. B. Dreis, Ch. Pichler, H. P. Wellisch, Max Weber, M. A. Jabiol, T. P. Yiou, Martin Erdmann, F. Charles, J. Katzy, T. Khler, U. Obrock, S. Reinshagen, A. Panitch, C. Keuker, J. Martyniak, Carl R. Brune, M. Barth, R. Marshall, M. F. Hess, T. Carli, B. Fominykh, L. R. West, U. Bassler, M. W. Krasny, T. Kurča, M. Htte, P. Kostka, B. Naroska, G. D. Patel, A. Usik, R. Nahnhauer, Zhiqing Zhang, Benno List, H. Krehbiel, J. Turnau, K. Mller, Barbara Clerbaux, H. K. Nguyen, I. V. Gorelov, J. Zcek, H. Bergstein, Eckhart Fretwurst, M. Arpagaus, G. Siegmon, K. C. Hoeger, T.C. Nicholls, B. Schwab, David Schmidt, S. Levonian, A. Gellrich, J. E. Olsson, W. Bartel, G. Buschhorn, V. Efremenko, F. Lamarche, R. Grssler, P. Ribarics, H. Duhm, B. Andrieu, M. Wagener, V. Riech, R. Felst, R. Beyer, K. Flamm, E. Barrelet, David Cussans, S. Mani, E. A. De Wolf, Ch. Berger, F. Moreau, J. D. Dowell, Ch. Coutures, W. Struczinski, J. M. Foster, D. Feeken, W. Braunschweig, M. Savitsky, R. Sell, S. Kazarian, Hermann Kolanoski, D. Clarke, M. Ibbotson, A. Mavroidis, E. Gabathuler, C. Pascaud, M. Hapke, John A Coughlan, A. Lebedev, S. Egli, Horst Oberlack, G. Weber, U. Siewert, E. Deffur, P. Baranov, S. Mikocki, A. Jacholkowska, Peter Schleper, H. P. Beck, Stephen Burke, M. Zimmer, J. Feltesse, Vincent Boudry, Jean-Francois Laporte, P. I. P. Kalmus, M. Rietz, S. Valkr, D. Haidt, Laurent Favart, C. Dollfus, C. A. Meyer, Karlheinz Meier, K. Zuber, Marc Besancon, J. Riedlberger, U. Krner-Marquis, J. Cvach, A.S. Belousov, Sergey Rusakov, B. Gonzalez-Pineiro, G. Schmidt, A. Braemer, V. Blobel, S. M. Robertson, U. Stsslein, S. D. Kolya, Jean-Arcady Meyer, Eram Rizvi, A. Gruber, F. Rouse, M. David, Ulrich Goerlach, M. Vecko, R. Gerhards, Daniel Pitzl, C. Kleinwort, R. L. Lander, Frank Raupach, K. H. Hiller, Daniel Johnson, D. Mercer, I. Herynek, R. C. W. Henderson, E. Prez, N. Wulff, J. Tutas, S. Masson, R. Buchholz, M. Flieser, F. Niebergall, David Milstead, J. Stier, Y. Vazdik, P. Kasselmann, V.L. Hudgson, Stephen Maxfield, P. A. Smirnov, J. Stiewe, R. Prosi, A. Schning, J. Martens, U P. Krger, F. Kole, S. K. Kotelnikov, L. Hajduk, A. B. Clegg, R. Rylko, Andrew Mehta, N. Gogitidze, M. Fleischer, K. Johannsen, H. Kster, D. Lke, P. Murn, K. Rter, Peter Schacht, S. Tapprogge, W.D. Dau, J. B. Dainton, J. Lipinski, K. Stephens, E. Peppel, A. Valkrov, J. Spiekermann, Gregorio Bernardi, J. Ebert, R. Starosta, Anton Babaev, C. Thiebaux, J. Strachota, F. Sefkow, Peter Loch, R. D. Martin, Didier Lacour, G. Pope, J. Garvey, A. M. Fomenko, G. Villet, Pierre Marage, M. J. Burton, H. Spitzer, A. Courau, O. Dnger, Christophe Royon, Winston Ko, Guenter Eckerlin, Steve McMahon, V. Schrder, F. Linsel, G C. Lpez, J. Heatherington, G. Flgge, R. D. Appuhn, C. Gruber, G. Lindstrm, D. Kant, G. Rdel, Kerstin Borras, D. Newton, A. Semenov, Yu. Solovev, F. Brasse, P. Lanius, Markus Seidel, M. Korn, R. Nisius, U. Straumann, Thomas Naumann, V. Korbel, J. R. Smith, L. Buengener, E. Eisenhandler, R. Maraček, Fabian Zomer, G. Cozzika, F. Eisele, W. von Schlippe, Hannes Jung, Alexander Zhokin, T. Merz, C. Vallée, E. Evrard, S. Dagoret, J. Ferencei, V I. Shekelyan, K. Wacker, R. Steinberg, Dusan Bruncko, F. Ferrarotto, H. Genzel, T. Greenshaw, J.P. Phillips, P. Van Esch, J. Marks, B. Delcourt, C. Leverenz, K. Rosenbauer, M. Jaffré, G. Thompson, M. Oakden, H. Meyer, E. Wnsch, H. Henschel, H. J. Behrend, J.C. Bizot, M. Goldberg, H. Shooshtari, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Diffraction, Nuclear and High Energy Physics, Range (particle radiation), Logarithm, Proton, 010308 nuclear & particles physics, Momentum transfer, Hadron, FOS: Physical sciences, HERA, 01 natural sciences, Measure (mathematics), High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Atomic physics, 010306 general physics
Abstract: A measurement of the proton structure function $F_{\!2}(x,Q^2)$ is reported for momentum transfer squared $Q^2$ between 4.5 $GeV^2$ and 1600 $GeV^2$ and for Bjorken $x$ between $1.8\cdot10^{-4}$ and 0.13 using data collected by the HERA experiment H1 in 1993. It is observed that $F_{\!2}$ increases significantly with decreasing $x$, confirming our previous measurement made with one tenth of the data available in this analysis. The $Q^2$ dependence is approximately logarithmic over the full kinematic range covered. The subsample of deep inelastic events with a large pseudo-rapidity gap in the hadronic energy flow close to the proton remnant is used to measure the "diffractive" contribution to $F_{\!2}$., 32 pages, ps, appended as compressed, uuencoded file
Published: 1995

31. Comparison of Deep Inelastic Scattering with Photoproduction Interactions at HERA

Author: Steve McMahon, K. Rüter, C. Niebuhr, R. Nisius, D. Goldner, B. Laforge, P. Palmen, R. Marshall, Y. Soloviev, P. E. Reimer, Dirk Krücker, C. Cormack, J. M. Foster, J. Riedlberger, V. Lubimov, G. G. Winter, B. Gonzalez-Pineiro, K. Zuber, S. M. Robertson, G. Bertrand-Coremans, P. Steffen, G. Cozzika, M. Hütte, J. R. Smith, F. Eisele, E. Eisenhandler, H. Krehbiel, A. Pieuchot, G. Buschhorn, D. Ozerov, J. Cvach, Ch. Niedzballa, K. Rybicki, M. Charlet, J.P. Phillips, Stefan Valkar, D. Zarbock, H. P. Wellisch, Wolfram Erdmann, L. Criegee, R. L. Lander, R. Starosta, Max Weber, T. Carli, L. N. Shtarkov, Daniel Pitzl, Christoph Grab, Hannes Jung, Alexander Zhokin, J. H. Köhne, Martin Erdmann, U. Obrock, F. Niebergall, Frank Raupach, A. Walther, A. Meyer, H. Hufnagel, F. Linsel, Peter Schacht, G. C. Lopez, R. Kaschowitz, T. Jansen, K. Stephens, E. Peppel, M. Höppner, S. Prell, J. Formánek, F. Sefkow, Ch. Ley, W. Zimmermann, S. K. Kotelnikov, E. Malinovski, A. Panitch, Gregorio Bernardi, J. Heatherington, K. C. Hoeger, T.C. Nicholls, Paul Richard Newman, Grzegorz Nowak, Gianfranco Sciacca, N. Wulff, E. Mroczko, M. Gebauer, K. Daum, M. Kuhlen, D. Feeken, C.D. Hilton, J.G. Contreras, Roland Horisberger, G. Grindhammer, A. Valkárová, D. Vandenplas, L. Hajduk, H. Rick, P. Kasselmann, S. Riess, F. Lehner, D. Newton, Anton Babaev, M. Oakden, A. Gellrich, C. Thiebaux, C. Jacobsson, E. Evrard, H. U. Martyn, Matthias Klein, V. Riech, J. Theissen, G. Rädel, F. Lamarche, Christophe Royon, G. Knies, J. Strachota, M. Hapke, H. Meyer, S. Kermiche, P. Bispham, M. Hampel, B. Kuznik, Hans Peter Beck, A. Wagener, P. Hill, J. V. Morris, G. Schmidt, J. P. Sutton, P. Di Nezza, J. Spiekermann, I. R. Kenyon, Ph. Huet, P. Goritchev, M. Jaffre, J. E. Olsson, Armen Vartapetian, Ch. Pichler, S. Reinshagen, J. Bán, J. Haack, Didier Lacour, R. Roosen, W. Bartel, J. Martyniak, Winston Ko, J. Janoth, G. Pope, G. Villet, P. Lanius, C. Pascaud, Pierre Marage, Guenter Eckerlin, B. Delcourt, R. Gerhards, André Schöning, S. Schleif, H. Spitzer, A. Rostovtsev, A. Droutskoi, F. W. Büsser, W. Braunschweig, C. Leverenz, K. H. Hiller, D. Neyret, Wolfgang Lange, Hermann Kolanoski, D. Clarke, John A Coughlan, R. Sell, Markus Seidel, A. Glazov, V. Tchernyshov, I. O. Skillicorn, H. B. Dreis, U. Krüner-Marquis, R. C. W. Henderson, J. Tutas, J. D. Burger, R. Maraček, J-P. Meyer, K. Gabathuler, A. Buniatian, D. Wegener, W.J. Haynes, L. R. West, S. Spielman, R. J. Ellison, S. Kazarian, B. Fominykh, A. Courau, P. Dixon, W. von Schlippe, U. Siewert, S. Levonian, O. Hamon, K. Rosenbauer, Horst Oberlack, T. Mavroidis, J. Duboc, B. Stella, M. Zimmer, Volker Blobel, C. Keuker, Klaus Rabbertz, Murrough Landon, A. E. Wright, Dusan Bruncko, U. Kathage, M. Forbush, S. Eichenberger, R. Prosi, V. Brisson, T. Köhler, M. W. Krasny, Vincent Boudry, T. Merz, H. Pawletta, M. Arpagaus, F. Charles, J. Katzy, M. F. Hess, J. Gayler, J. W. Lomas, W. Hildesheim, P. Kostka, A. Migliori, J. Bähr, R.K. Griffiths, Emmanuelle Perez, G. Lobo, Jean-Francois Laporte, J. Garvey, A. M. Fomenko, G. Thompson, R. Bernet, J. Žáček, H. E. Roloff, M. Korn, V. Efremenko, J. Turnau, M. Wagener, Eckhart Fretwurst, V. Solochenko, K. Stolze, Leif J. Jönsson, B. Naroska, R. Nahnhauer, F. Ferrarotto, D. Düllmann, H. Genzel, S. Mikocki, S. Willard, M. Steenbock, B. Schwab, K. Flamm, P. I. P. Kalmus, H. Itterbeck, P. Van Mechelen, A. Braemer, G. Müller, S. Bourov, B. Waugh, E. Barrelet, H. Lohmander, Pavel Murin, H. Grässler, David Cussans, H. Henschel, G. Weber, U. Straumann, G. Siegmon, Carl R. Brune, M. Barth, S. Mani, H. J. Behrend, J.C. Bizot, M. Goldberg, Zhen Zhang, M. J. Burton, A. Lebedev, S. Egli, M. Rietz, M. Ibbotson, E. A. De Wolf, Ch. Berger, Karlheinz Meier, C. Wittek, B. Andrieu, M. Winde, R. Beyer, Peter Robmann, Stephen Burke, L. Büngener, F. Moreau, J. Hladký, P. Uelkes, L. Johnson, J. D. Dowell, Yong Ban, V. Korbel, D. Haidt, N. Magnussen, R. Barschke, I. Herynek, Laurent Favart, A. Jacholkowska, F. Zomer, L. Del Buono, C. Dollfus, V. Andreev, P. Baranov, S. D. Kolya, T. Greenshaw, Eram Rizvi, G. Heinzelmann, F. Rouse, Ulrich Goerlach, A. Usik, N. Sahlmann, H. Ehrlichmann, Peter Schleper, E. Schuhmann, M. Fleischer, T. Krämerkämper, H. Küster, D. Lüke, P. Biddulph, Marc Besancon, A.S. Belousov, E. Wünsch, Dave Sankey, M. A. Jabiol, Sergey Rusakov, P. Truöl, Rosario Martín, G. D. Patel, U. Bassler, P. Van Esch, G. Martin, David Schmidt, O. Dünger, F. Botterweck, Claus Kleinwort, P. Ribarics, R. Felst, S. Schiek, A. Wegner, C. A. Meyer, J. Zsembery, E. Panaro, J. Kurzhöfer, V. Nagovizin, A. Gruber, R. Eichler, P.-O. Meyer, G. W. Noyes, Daniel Johnson, L. Goerlich, I. Sheviakov, U. Krüger, S. Dagoret, J. Ferencei, V I. Shekelyan, K. Wacker, R. Steinberg, Th. Naumann, H. Duhm, E. Gabathuler, M. David, D. Kant, Kerstin Borras, A. Semenov, F. Brasse, C.L. Davis, C. Vallée, R. D. Appuhn, M. Flieser, J. Stier, G. Lindström, C. Gruber, J. Marks, Y. Vazdik, H. K. Nguyen, I. V. Gorelov, K. Müller, R. Grässler, Ch. Coutures, W. Struczinski, V.L. Hudgson, Stephen Maxfield, J. Stiewe, A. B. Clegg, R. Rylko, Andrew Mehta, N. Gogitidze, J. Ebert, M. Nyberg-Werther, J. Feltesse, T. R. Ebert, A. Fedotov, Günter Flügge, T. P. Yiou, M. zurNedden, R. Buchholz, David Milstead, C. Kiesling, P. A. Smirnov, J. Martens, A. De Roeck, A. J. Campbell, F. Kole, U. Stößlein, T. Kurča, S. Tapprogge, W.D. Dau, J. B. Dainton, Benno List, Barbara Clerbaux, J. M. Link, P. Loch, P. Verrecchia, V. Schröder, H. H. Kaufmann, Eckhard Elsen, S. Aid, Yves Sirois, D. Mercer, J. Lipinski, G. Franke, S. Masson, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), H1, and Starita, Sabine
Subjects: Nuclear and High Energy Physics, Particle physics, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Astrophysics::High Energy Astrophysical Phenomena, Hadron, FOS: Physical sciences, Parton, 01 natural sciences, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), law, Energy flow, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Rapidity, 010306 general physics, Collider, Nuclear Experiment, Physics, 010308 nuclear & particles physics, HERA, Deep inelastic scattering, High Energy Physics::Experiment
Abstract: Photon-proton ($\gamma p$) interactions with~$Q^25$~GeV$^2$ are studied at the high energy electron-proton collider HERA. The transverse energy flow and relative rates of large rapidity gap events are compared in the two event samples. The observed similarity between $\gamma p$ and $\gamma^* p$ interactions can be understood in a picture where the photon develops as a hadronic object. The transverse energy density measured in the central region of the collision, at $\eta^*=0$ in the $\gamma^* p$ centre of mass frame, is compared with data from hadron-hadron interactions as function of the CMS energy of the collision., Comment: 15 pages, latex, 4 figures appended as uuencoded file
Published: 1995
Full Text: View/download PDF

32. Deep inelastic scattering events with a large rapidity gap at HERA

Author: F. Kole, H. P. Wellisch, M. Jaffre, J. E. Olsson, W. Bartel, J. Stiewe, F. W. Büsser, M. Vecko, B. Stella, I. O. Skillicorn, R. Maraček, W. Braunschweig, Andrew Mehta, N. Gogitidze, R. Sell, S. Kazarian, P. Biddulph, U. Siewert, C. A. Meyer, H. U. Martyn, V. Brisson, H. Grässler, M. Zimmer, S. Tapprogge, L. Criegee, Paul Richard Newman, C. Jacobsson, Michael Seidel, K. C. Hoeger, J. V. Morris, G. Schmidt, Peter Robmann, Carl R. Brune, M. Barth, J-P. Meyer, P. Goritchev, A. Lindner, J. Ebert, A. Walther, S. Eichenberger, A. M. Goodall, V. Riech, D. Milstead, J. Žáček, S. Rusakov, J. Formánek, Murrough Landon, J. Bürger, W. von Schlippe, G. Knies, H. Itterbeck, P. Van Mechelen, Laurent Favart, T. Merz, C. Dollfus, S. Schiek, E. Peppel, K. Stephens, M. Forbush, L. Goerlich, K. Rosenbauer, D. Neyret, T. Ahmed, A. Schwind, P. Ribarics, J. Baehr, M. Colombo, M. Savitsky, C. Niebuhr, M. Hapke, R. C. W. Henderson, J. R. Smith, J. Haack, M. Ibbotson, H. B. Dreis, J. Martyniak, M. W. Krasny, D. Lüke, E. Eisenhandler, Ulrich Goerlach, S. Egli, J. G. Contreras, E. Malinovski, M. Kuhlen, A. Lebedev, G. Thompson, B. Schwab, U. Kathage, K. Zuber, J. Cvach, U. Bassler, Y. Soloviev, J. Heaterington, B. Fominykh, A. Gellrich, K. Johannsen, O. Dünger, E. Perez, M. Gebauer, V. Hedberg, D. Goldner, D. Düllmann, M. Rietz, D. Haidt, D. Feeken, M. Weber, R. Horisberger, H. Bergstein, S. D. Kolya, Th. Naumann, N. Wulff, Th. Wolff, C. Royon, F. Zomer, F. Botterweck, E. Gabathuler, T.P. Yiou, S. J. McMahon, I. Sheviakov, R. Kaschowitz, Barbara Clerbaux, A. Buniatian, H. Krehbiel, S. Valkár, A. E. Wright, S. Riess, H. Duhm, G. Heinzelmann, H. J. Behrend, J.C. Bizot, M. Goldberg, D. Wegener, W.J. Haynes, S. J. Maxfield, E. Evrard, S. Prell, R. Roosen, R. Rylko, M. Fleischer, W. Hildesheim, P. Kasselmann, I. R. Kenyon, R. Gerhards, P. E. Reimer, K. Gamerdinger, Christoph Grab, R. Felst, J. Kurzhöfer, D. Schmidt, Wolfgang Lange, B. Naroska, Hermann Kolanoski, Winston Ko, D. Clarke, C. Pascaud, John A Coughlan, J. Hladký, P. Hill, J. Bán, H. Küster, L. R. West, U. Krüner-Marquis, T. Köhler, Guenter Eckerlin, C. Vallée, K. Gabathuler, S. Aid, P. Di Nezza, H. Ehrlichmann, H. Spitzer, J. M. Foster, Yves Sirois, S. Willard, G. Lindström, D. Kant, Ch. Ley, V. Boudry, Anton Babaev, R. J. Ellison, A. Valkárová, W. Zimmermann, A. Wagener, J. Feltesse, P. Baranov, J. Lipinski, S. Kermiche, Alan Campbell, G. G. Winter, M. F. Hess, G. Grindhammer, P. Steffen, Peter Schleper, E. M. Hanlon, M. Winde, P. Uelkes, V. Efremenko, S. Mikocki, J. Riedlberger, S. M. Robertson, R. Nahnhauer, E. Barrelet, L. Johnson, David Cussans, E. Wünsch, L. N. Shtarkov, M. A. Jabiol, A. Braemer, Dave Sankey, G. Franke, A. Schöning, R. D. Appuhn, P. Loch, N. Magnussen, J. Turnau, H. K. Nguyen, I. V. Gorelov, R. Grässler, Ch. Coutures, W. Struczinski, A. Panitch, G. Nowak, S. Reinshagen, C. Kiesling, E. A. De Wolf, Ch. Berger, L. Büngener, U. Krüger, Marc Besancon, A.S. Belousov, E. Sanchez, J. Janoth, A. Gruber, N. Sahlmann, G. D. Patel, H. Meyer, Max Klein, V. Schröder, D.P. Johnson, H. Shooshtari, S. Masson, T. Carli, L. Jönsson, R. Buchholz, P. A. Smirnov, K. Meier, J. Gayler, F. R. Rouse, R. Nisius, R. Bernet, L. Del Buono, J. Strachota, Vladimir Andreev, I. Herynek, S. Dagoret, A. Usik, S. Levonian, J. F. Laporte, P. Truöl, F. Lamarche, C. Schmidt, J. P. Sutton, M. Steenbock, B. Andrieu, A. B. Clegg, Volker Blobel, H. E. Roloff, C. Gruber, M. Arpagaus, K. Rybicki, Richard Lander, K. Rüter, C. Keuker, R. Marshall, Z. Zhang, Dirk Krücker, J. Ferencei, V I. Shekelyan, K. Flamm, I. Tichomirov, P. Murín, H. Hufnagel, S. Mani, H. P. Beck, O. Hamon, Kerstin Borras, R. Starosta, A. Semenov, H. H. Kaufmann, Stephen Burke, M. Höppner, C.D. Hilton, J. Duboc, P. Verrecchia, U. Seehausen, D. Lacour, R. Herma, K. Wacker, R. Steinberg, B. Gonzalez-Pineiro, K. Müller, F. Brasse, H. Lohmander, J. Garvey, J. P. Kubenka, Martin Erdmann, A. M. Fomenko, U. Obrock, F. Niebergall, V. Korbel, Dusan Bruncko, D. Mercer, F. Ferrarotto, H. Genzel, P. Van Esch, E. Elsen, A. Rostovtsev, Claus Kleinwort, G. Bertrand-Coremans, A. Wegner, F. Sefkow, P. Lanius, E. Panaro, V. Nagovizin, R. Eichler, G. Müller, C. Thiebaux, G. W. Noyes, Daniel Pitzl, E. Deffur, G. C. Lopez, P. Kostka, E. Fretwurst, B. List, T. R. Ebert, F. Raupach, A. Fedotov, Günter Flügge, A. De Roeck, F. Charles, H. Henschel, T. Kurča, P. Schacht, J. Stier, J. Marks, Y. Vazdik, S. K. Kotelnikov, M. Nyberg-Werther, L. Hajduk, B. Delcourt, T. Mavroidis, U. Stösslein, C. Leverenz, G. Cozzika, F. Eisele, J.P. Phillips, Hannes Jung, R. D. Martin, G. Pope, I. W. Walker, E. Schuhmann, H. Oberlack, G. Villet, Pierre Marage, M. Korn, A. Courau, G. Weber, U. Straumann, R. E. Taylor, G. Bernardi, G. Buschhorn, F. Linsel, Tim Greenshaw, M. Flieser, D. Newton, V. Tchernyshov, K. H. Hiller, J. Tutas, R. Prosi, G. Siegmon, F. Moreau, J. D. Dowell, A. Jacholkowska, A. Vartapetian, T. Jansen, P. I. P. Kalmus, G. Rädel, M. Hampel, B. Kuznik, Ph. Huet, Ch. Pichler, and J. Martens
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, High Energy Physics::Phenomenology, Parton, Vector meson dominance, HERA, Inelastic scattering, Deep inelastic scattering, Nuclear physics, High Energy Physics::Experiment, Rapidity, Vector meson, Nuclear Experiment
Abstract: Evidence is presented using data taken with the H1 detector at HERA for a class of deep inelastic electron-proton scattering (DIS) events (5 < Q2 < 120 GeV2) at low Bjorken-x (10−4 < x < 10−2) which have almost no hadronic energy flow in a large interval of pseudo-rapidity around the proton remnant direction and which cannot be attributed to our present understanding of DIS and fluctuations in final state hadronic fragmentation. From an integrated luminosity of 273 nb−1, 734 events, that is about 5% of the total DIS sample, have no energy deposition greater than 400 MeV forward of laboratory pseudo-rapidity ηmax = 1.8 up to the largest measurable pseudo-rapidity of about 3.65. Evidence that about 10% of observed rapidity gap events are exclusive vector meson electroproduction is presented. Good descriptions of the data are obtained using models based either on a vector meson dominance like picture, which includes a large fraction of inelastic virtual photon dissociation, or on deep inelastic electron-pomeron scattering in which the partonic sub-structure of the latter is resolved.
Published: 1994

33. Charged particle multiplicities in deep inelastic scattering at HERA

Author: Aid, S., Zsembery, J., Zuber, K., Zurnedden, M., Zimmer, M., Zomer, F., Zhokin, A., Zarbock, D., Zhiqing Zhang, Wunsch, E., Zacek, J., Yiou, T. P., Wittek, C., G Winter, G., Winde, M., Willard, S., Wilksen, T., Wellisch, H. P., West, L. R., Wegener, D., Wegner, A., Weber, M., Weber, G., Waugh, B., Walther, A., Wagener, M., Wagener, A., Wacker, K., Villet, G., Verrecchia, P., Vazdik, Y., Mechelen, P., Esch, P., Vandenplas, D., Vallee, C., Valkarova, A., Usik, A., Valkar, S., Tutas, J., Uelkes, P., Turnau, J., Truol, P., Thiebaux, C., Thompson, G., Theissen, J., Tchernyshov, V., Tchetchelnitski, S., Stolze, K., Tapprogge, S., Tasevsky, M., Straumann, U., Struczinski, W., Sutton, P., Stier, J., Stiewe, J., Stosslein, U., Steiner, H., Stella, B., Steffen, P., Steinberg, R., Steenbock, M., Squinabol, F., Starosta, R., Spiekermann, J., Spielman, S., Spitzer, H., Specka, A., Soloviev, Y., Solochenko, V., Smith, J. R., Smirnov, P., Sirois, Y., Skillicorn, I. O., Siewert, U., Sell, R., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Seidel, M., Sefkow, F., Schwab, B., Schumann, E., Schroder, V., Schmidt, G., Schoning, A., Semenov, A., Schmidt, D., Schlippe, W., Schleper, P., Schleif, S., Schiek, S., Schacht, P., Sankey, D. P. C., Sahlmann, N., Rybicki, K., Ruter, K., Rusakov, S., Rostovtsev, A., Rouse, F., Royon, C., Rosenbauer, K., Roosen, R., Roloff, H. E., Robmann, P., Robertson, S. M., Rizvi, E., Rietz, M., Riess, S., Riepenhausen, F., Riedlberger, J., Riech, V., Rick, H., Reinshagen, S., Reimer, P., Raupach, F., Radel, G., Prosi, R., Rabbertz, K., Prell, S., Pieuchot, A., Pitzl, D., Phillips, J. P., Perez, E., Pawletta, H., Peppel, E., Patel, G. D., Panitch, A., Pascaud, C., Panaro, E., Palmen, P., Ozerov, D., Obrock, U., Oakden, M., Oberlack, H., Olsson, J. E., Nyberg-Werther, M., Noyes, G. W., Nowak, G., Niggli, H., Nisius, R., Ch. Niedzballa, Niebuhr, C., Niebergall, F., Nicholls, T. C., Nguyen, H. K., Neyret, D., Newton, D., Newman, P. E., Th. Naumann, Naroska, B., Nahnhauer, R., Nagovizin, V., Murin, P., Muller, K., Muller, G., Muller, D., Mroczko, E., Morris, J. V., Moreau, F., Moeck, J., Milstead, D., Mikocki, S., Migliori, A., O Meyer, P., Meyer, H., Meyer, J., Merz, T., Meyer, A., Mehta, A., Meier, K., Maxfield, S. J., Mcmahon, S. J., Mavroidis, T., U Martyn, H., Martyniak, J., Masson, S., Martin, G., Roland Martin, Marshall, R., Martens, J., Marks, J., Maracek, R., Marage, P., Mani, S., Malinovski, E., Magnussen, N., Luke, D., Lubimov, V., Lopez, G. C., Lobo, G., Loch, P., Lohmander, H., Lomas, J. W., List, B., Link, J., Linsel, F., Lipinski, J., Levonian, S., Ch. Ley, Lindstrom, G., Lindstroem, M., Leverenz, C., F Laporte, J., Lebedev, A., Lehner, F., Langenegger, U., Lanius, P., Lange, W., Landon, M. P. J., Lamarche, F., Lander, R., Lacour, D., Laforge, B., Kurzhofer, J., Kurca, T., Kuster, H., Kuhlen, M., Kruger, U., Kruner-Marquis, U., Krucker, D., Krehbiel, H., Krasny, M. W., Kramerkamper, T., Kostka, P., Kotelnikov, S. K., Kolya, S. D., Korbel, V., Korn, M., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Ko, W., Kohler, T., Kohne, J. H., Kolanoski, H., Kole, F., Kaufmann, H. H., Kazarian, S., Johnson, D. P., Johnson, L., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kaschowitz, R., Kathage, U., Katzy, J., Jonsson, L., Johannsen, K., Hutte, M., Hufnagel, H., Ibbotson, M., Itterbeck, H., A Jabiol, M., Jacholkowska, A., Jacobsson, C., Jaffre, M., Janoth, J., Jansen, T., Holtom, T., Horisberger, R., Hoffmann, D., Hoppner, M., Hoeger, K. C., Hladky, J., Hilton, C. D., Hiller, H., Hildesheim, W., Hess, M. F., Herynek, I., Andreev, V., Andrieu, B., D Appuhn, R., Arpagaus, M., Babaev, A., Bahr, J., Ban, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Barth, M., Bassler, U., Beck, H. P., J Behred, H., Belousov, A., Ch. Berger, Bernardi, G., Bernet, R., Bertrand-Coremans, G., Besancon, M., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Blobel, V., Borras, K., Botterweck, F., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Bruncko, D., Brune, C., Buchholz, R., Bungener, L., Burger, J., Busser, F. W., Buniatian, A., Burke, S., Burton, M. J., Buschhorn, G., Campbell, A. J., Carli, T., Charles, F., Charlet, M., Clarke, D., Clegg, A. B., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., C Cousinou, M., Ch. Coutures, Cozzika, G., Criegee, L., Cussans, D. G., Cvach, J., Sylvie DAGORET, Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., Delcourt, B., Del Buono, L., Roeck, A., Wolf, E. A., Dirkmann, M., Dixon, P., Di Nezza, P., Dlugosz, W., Dollfus, C., Dowell, J. D., Dreis, H. B., Droutskoi, A., Duboc, J., Dullmann, D., Dunger, O., Duhm, H., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellison, R. J., Elsen, E., Erdmann, M., Erdmann, W., Evrard, E., Fahr, A. B., Favart, L., Fedotov, A., Feeken, D., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flugge, G., Fomenko, A., Fominykh, B., Forbush, M., Formanek, J., Foster, J. M., Franke, G., Fretwurst, E., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gellrich, A., Genzel, H., Gerhards, R., Glazov, A., Goerlach, U., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Golec-Biernat, K., Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grassler, H., Grassler, R., Greenshaw, T., Griffiths, R., Grindhammer, G., Gruber, A., Gruber, C., Haack, J., Haidt, D., Hajduk, L., Hamon, O., Hampel, M., Hapke, M., Haynes, W. J., Heinzelmann, J., Henderson, R. C. W., Henschel, H., Hudgson, V. L., Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), H1, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and Kerec, Hélène
Subjects: Quantum chromodynamics, Physics, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, FOS: Physical sciences, Parton, Multiplicity (mathematics), HERA, Deep inelastic scattering, 01 natural sciences, Charged particle, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Pseudorapidity, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment
Abstract: Using the H1 detector at HERA, charged particle multiplicity distributions in deep inelastic ep scattering have been measured over a large kinematical region. The evolution with $W$ and $Q^2$ of the multiplicity distribution and of the multiplicity moments in pseudorapidity domains of varying size is studied in the current fragmentation region of the hadronic centre-of-mass frame. The results are compared with data from fixed target lepton-nucleon interactions, $e^+e^-$ annihilations and hadron-hadron collisions as well as with expectations from QCD based parton models. Fits to the Negative Binomial and Lognormal distributions are presented., 40 pages, latex, 8 Figures

34. Elastic and inelastic photoproduction of J/$\psi$ mesons at HERA

Author: Aid, S., Zsembery, J., Zuber, K., Zurnedden, M., Zimmer, M., Zomer, F., Zhokin, A., Zarbock, D., Zhang, Z., Wunsch, E., Zacek, J., Yiou, T. P., Wittek, C., G Winter, G., Winde, M., Willard, S., Wilksen, T., Wellisch, H. P., West, L. R., Wegener, D., Wegner, A., Weber, M., Weber, G., Waugh, B., Walther, A., Wagener, M., Wagener, A., Wacker, K., Villet, G., Verrecchia, P., Vazdik, Y., Mechelen, P., Esch, P., Vandenplas, D., Vallee, C., Valkarova, A., Usik, A., Valkar, S., Tutas, J., Uelkes, P., Turnau, J., Truol, P., Thiebaux, C., Thompson, G., Theissen, J., Tchernyshov, V., Tchetchelnitski, S., Stolze, K., Tapprogge, S., Tasevsky, M., Straumann, U., Struczinski, W., Sutton, P., Stier, J., Stiewe, J., Stosslein, U., Steiner, H., Stella, B., Steffen, P., Steinberg, R., Steenbock, M., Squinabol, F., Starosta, R., Spiekermann, J., Spielman, S., Spitzer, H., Specka, A., Soloviev, Y., Solochenko, V., Smith, J. R., Smirnov, P., Sirois, Y., Skillicorn, I. O., Siewert, U., Sell, R., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Seidel, M., Sefkow, F., Schwab, B., Schumann, E., Schroder, V., Schmidt, G., Schoning, A., Semenov, A., Schmidt, D., Schlippe, W., Schleper, P., Schleif, S., Schiek, S., Schacht, P., Sankey, D. P. C., Sahlmann, N., Rybicki, K., Ruter, K., Rusakov, S., Rostovtsev, A., Rouse, F., Royon, C., Rosenbauer, K., Roosen, R., Roloff, H. E., Robmann, P., Robertson, S. M., Rizvi, E., Rietz, M., Riess, S., Riepenhausen, F., Riedlberger, J., Riech, V., Rick, H., Reinshagen, S., Reimer, P., Raupach, F., Radel, G., Prosi, R., Rabbertz, K., Prell, S., Pieuchot, A., Pitzl, D., Phillips, J. P., Perez, E., Pawletta, H., Peppel, E., Patel, G. D., Panitch, A., Pascaud, C., Panaro, E., Palmen, P., Ozerov, D., Obrock, U., Oakden, M., Oberlack, H., Olsson, J. E., Nyberg-Werther, M., Noyes, G. W., Nowak, G., Niggli, H., Nisius, R., Ch. Niedzballa, Niebuhr, C., Niebergall, F., Nicholls, T. C., Nguyen, H. K., Neyret, D., Newton, D., Newman, P. E., Th. Naumann, Naroska, B., Nahnhauer, R., Nagovizin, V., Murin, P., Muller, K., Muller, G., Muller, D., Mroczko, E., Morris, J. V., Moreau, F., Moeck, J., Milstead, D., Mikocki, S., Migliori, A., O Meyer, P., Meyer, H., Meyer, J., Merz, T., Meyer, A., Mehta, A., Meier, K., Maxfield, S. J., Mcmahon, S. J., Mavroidis, T., U Martyn, H., Martyniak, J., Masson, S., Martin, G., Roland Martin, Marshall, R., Martens, J., Marks, J., Maracek, R., Marage, P., Mani, S., Malinovski, E., Magnussen, N., Luke, D., Lubimov, V., Lopez, G. C., Lobo, G., Loch, P., Lohmander, H., Lomas, J. W., List, B., Link, J., Linsel, F., Lipinski, J., Levonian, S., Ch. Ley, Lindstrom, G., Lindstroem, M., Leverenz, C., F Laporte, J., Lebedev, A., Lehner, F., Langenegger, U., Lanius, P., Lange, W., Landon, M. P. J., Lamarche, F., Lander, R., Lacour, D., Laforge, B., Kurzhofer, J., Kurca, T., Kuster, H., Kuhlen, M., Kruger, U., Kruner-Marquis, U., Krucker, D., Krehbiel, H., Krasny, M. W., Kramerkamper, T., Kostka, P., Kotelnikov, S. K., Kolya, S. D., Korbel, V., Korn, M., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Ko, W., Kohler, T., Kohne, J. H., Kolanoski, H., Kole, F., Kaufmann, H. H., Kazarian, S., Johnson, D. P., Johnson, L., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kaschowitz, R., Kathage, U., Katzy, J., Jonsson, L., Johannsen, K., Hutte, M., Hufnagel, H., Ibbotson, M., Itterbeck, H., A Jabiol, M., Jacholkowska, A., Jacobsson, C., Jaffre, M., Janoth, J., Jansen, T., Holtom, T., Horisberger, R., Hoffmann, D., Hoppner, M., Hoeger, K. C., Hladky, J., Hilton, C. D., Hiller, H., Hildesheim, W., Hess, M. F., Herynek, I., Andreev, V., Andrieu, B., D Appuhn, R., Arpagaus, M., Babaev, A., Bahr, J., Ban, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Barth, M., Bassler, U., Beck, H. P., J Behred, H., Belousov, A., Ch. Berger, Bernardi, G., Bernet, R., Bertrand-Coremans, G., Besancon, M., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Blobel, V., Borras, K., Botterweck, F., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Bruncko, D., Brune, C., Buchholz, R., Bungener, L., Burger, J., Busser, F. W., Buniatian, A., Burke, S., Burton, M. J., Buschhorn, G., Campbell, A. J., Carli, T., Charles, F., Charlet, M., Clarke, D., Clegg, A. B., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., C Cousinou, M., Ch. Coutures, Cozzika, G., Criegee, L., Cussans, D. G., Cvach, J., Sylvie DAGORET, Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., Delcourt, B., Del Buono, L., Roeck, A., Wolf, E. A., Dirkmann, M., Dixon, P., Di Nezza, P., Dlugosz, W., Dollfus, C., Dowell, J. D., Dreis, H. B., Droutskoi, A., Duboc, J., Dullmann, D., Dunger, O., Duhm, H., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellison, R. J., Elsen, E., Erdmann, M., Erdmann, W., Evrard, E., Fahr, A. B., Favart, L., Fedotov, A., Feeken, D., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flugge, G., Fomenko, A., Fominykh, B., Forbush, M., Formanek, J., Foster, J. M., Franke, G., Fretwurst, E., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gellrich, A., Genzel, H., Gerhards, R., Glazov, A., Goerlach, U., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Golec-Biernat, K., Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grassler, H., Grassler, R., Greenshaw, T., Griffiths, R., Grindhammer, G., Gruber, A., Gruber, C., Haack, J., Haidt, D., Hajduk, L., Hamon, O., Hampel, M., Hapke, M., Haynes, W. J., Heinzelmann, J., Henderson, R. C. W., Henschel, H., Hudgson, V. L., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Photon, Meson, 010308 nuclear & particles physics, FOS: Physical sciences, HERA, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Transverse plane, Cross section (physics), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Production (computer science), High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: Results on \jpsi production in $e p$ interactionsin the H1 experiment at HERA are presented. The \jpsi mesons are produced by almost real photons ($Q^2\approx 0$) and detected via their leptonic decays. The data have been taken in 1994 and correspond to an integrated luminosity of $2.7 {pb}^{-1}$. The $\gamma p$ cross section for elastic \jpsi production is observed to increase strongly with the \cm energy. The cross section for diffractive $J/\psi$ production with proton dissociation is found to be of similar magnitude as the elastic cross section. Distributions of transverse momentum and decay angle are studied and found to be in accord with a diffractive production mechanism. For inelastic \jpsi production the total $\gamma p$ cross section, the distribution of transverse momenta, and the elasticity of the \jpsi are compared to NLO QCD calculations in a colour singlet model and agreement is found. Diffractive \psiprime production has been observed and a first estimate of the ratio to \jpsi production in the HERA energy regime is given., Comment: 27 pages, latex, 9 Figures appended as uuencoded file, figure 8b replaced

35. Experimental study of hard photon radiation processes at Hera

Author: C. Cormack, Alan Campbell, E. M. Hanlon, U. Stsslein, G. G. Winter, Wolfgang Lange, G. Grindhammer, P. Steffen, V. Lubimov, G. Siegmon, Frank Raupach, K. Rosenbauer, S. M. Robertson, R. Beyer, F. Moreau, J. D. Dowell, E. Malinovskii, D. Zarbock, D. Schmidt, K. Rter, Daniel Pitzl, N. Wulff, P. Kasselmann, M. Jaffré, G. Thompson, J. Buerger, Peter Schacht, B. Stella, H. P. Wellisch, Max Weber, L. N. Shtarkov, A. Jacholkowska, N. Magnussen, S. K. Kotelnikov, T. Krmerkmper, J. Gayler, K. Gabathuler, A. Buniatian, D. Wegener, W.J. Haynes, L. Hajduk, S. Aid, U P. Krger, N. Sahlmann, G. Villet, Gregorio Bernardi, V. Boudry, Pierre Marage, J. Feltesse, A. Courau, A. Panitch, M. W. Krasny, Peter Loch, Armen Vartapetian, Axel Lindner, R. Marshall, E. Schuhmann, Anton Babaev, Didier Lacour, G. Pope, Martin Erdmann, J. V. Morris, G. Schmidt, F. R. Rouse, V. Efremenko, A. Droutskoi, U. Obrock, J. G. Contreras, C. Thiebaux, J. Strachota, K. Gamerdinger, H. Krehbiel, E. Wnsch, H. J. Behrend, J.C. Bizot, M. Goldberg, R. Nisius, R. Grssler, G. Buschhorn, F. Niebergall, V. Korbel, M. Forbush, M. Htte, A. Schwind, M. A. Jabiol, E. Evrard, Max Klein, S. Mikocki, H. E. Roloff, K. Johannsen, K. C. Hoeger, S. Eichenberger, Carl R. Brune, M. Barth, Zhen Zhang, Vladimir Andreev, J. M. Foster, Christophe Royon, C. Niebuhr, A A. Akhundov, B. Schwab, V. Brisson, T. Jansen, H. Rick, R. Kaschowitz, Roland Horisberger, S. Riess, Steve McMahon, Dave Sankey, S. Egli, S. Valkr, T. P. Yiou, U. Bassler, R. Buchholz, D. Mercer, J. R. Smith, D. Goldner, L. Buengener, F. Linsel, P. A. Smirnov, K. Meier, G. Bertrand-Coremans, Tim Greenshaw, S. Levonian, A. Wegner, B. Naroska, V. L. Hudgson, G. D. Patel, Winston Ko, B. Delcourt, M. Kuhlen, V. Riech, A. Usik, H. Meyer, H. Grssler, M. Hampel, B. Kuznik, Stefan Tapprogge, E. Panaro, M. Savitsky, D.P. Johnson, Hans Peter Beck, H. Lohmander, A. Walther, J. Heatherington, S. Masson, K. Zuber, T. Kurca, M. Wagener, C. Pascaud, L. Criegee, D. Newton, P. Hill, I. W. Walker, V. Chernyshov, J. E. Olsson, W. Bartel, G. Mller, Christoph Grab, Laurent Favart, R. Eichler, C. Leverenz, C. Dollfus, Guenter Eckerlin, S. Rusakov, L. Grlich, M. Hapke, J. P. Kubenka, R. Nahnhauer, M. Hess, Ulrich Goerlach, Ph. Huet, Ch. Pichler, W. Zimmermann, P. Ribarics, J. Baehr, R. Felst, J. Bán, T. Ahmed, E. Barrelet, E. Mroczko, M. Gebauer, D. Kant, K. Flamm, David Cussans, A. Mavroidis, K. Stephens, E. Peppel, V. Nagovitsin, O. Dnger, G. Rdel, Kerstin Borras, R. M. Martin, W. Braunschweig, G. W. Noyes, P. Lanius, T. C. Nicholls, A. Gellrich, R. Sell, S. Kazarian, F. Lamarche, K. H. Hiller, R. C. W. Henderson, M. Hppner, A. Lebedev, J. Cvach, M. Oakden, L. Jnsson, M. Rietz, U. Siewert, P. Verrecchia, E. Snchez, P. I. P. Kalmus, G C. Lpez, E. A. De Wolf, Ch. Berger, M. Zimmer, G. Cozzika, F. Eisele, J. Janoth, E. Eisenhandler, R. Gerhards, R. J. Ellison, Jean-Francois Laporte, D. Haidt, G. Lindstrm, J. Tutas, Eram Rizvi, I. R. Kenyon, G. Heinzelmann, A. Semenov, Hermann Kolanoski, D. Clarke, John A Coughlan, H. H. Kaufmann, K. Mller, J.P. Phillips, C. A. Meyer, H. U. Martyn, A. Braemer, S. Dagoret, Volker Blobel, Paul Newman, C. Keuker, Judith Katzy, A. Valkrov, J. Spiekermann, H. Spitzer, M. Fleischer, R. Prosi, V. Schrder, A. Gruber, Roland Bernet, J. Formnek, Horst Oberlack, I. Herynek, A. Schning, R. Maraček, J-P. Meyer, B. Gonzalez-Pineiro, Hannes Jung, Alexander Zhokin, V I. Shekelyan, K. Wacker, R. Steinberg, W. von Schlippe, R. Starosta, T. Merz, M. Ibbotson, P. Baranov, S. Mani, Tancredi Carli, Stephen Burke, Yu. Solovev, F. Brasse, F W. Bsser, H. Shooshtari, Grzegorz Nowak, J. Martens, E. Prez, F. Kole, U. Seehausen, M. Korn, J. Riedlberger, Dusan Bruncko, F. Ferrarotto, G. Flgge, R. L. Lander, U. Krner-Marquis, H. Genzel, C. Jacobsson, Michael Seidel, J. Khne, F. Sefkow, Benno List, F. Charles, Barbara Clerbaux, Ch. Ley, Peter Schleper, H. Kster, D. Lke, J. Ferencei, P. Van Esch, J. Garvey, A. M. Fomenko, P. Murn, R. Taylor, J. Turnau, P. Trul, E. Elsen, J. Marks, A. Rostovtsev, J. P. Sutton, Claus Kleinwort, W.D. Dau, F. Zomer, J. B. Dainton, G. Weber, M. Steenbock, U. Straumann, B. Andrieu, M. J. Burton, A. Wagener, U. Kathage, E. Gabathuler, Marc Besancon, C. Vallée, H. K. Nguyen, A.S. Belousov, I. V. Gorelov, J. Zcek, Ch. Coutures, W. Struczinski, Stephen Maxfield, J. Stiewe, J. Kurzhfer, A. B. Clegg, R. Rylko, Andrew Mehta, N. Gogitidze, R. D. Appuhn, Yves Sirois, M. Vecko, J. Lipinski, J. Ebert, G. Franke, H. Hufnagel, C. Gruber, S. Kermiche, P. Goritchev, D. Dllmann, C.D. Hilton, Mikhail Danilov, R. Roosen, J. Duboc, D. Neyret, T. Khler, J. Martyniak, B. Fominykh, Eckhart Fretwurst, S. Reinshagen, C. Kiesling, M. Arpagaus, K. Rybicki, Wolfram Erdmann, D. Feeken, W. Hildesheim, M. Colombo, S. Willard, Murrough Landon, A. E. Wright, M. Winde, P. Uelkes, L. Johnson, H. Itterbeck, P. Van Mechelen, H. Erlichmann, O. Hamon, K. Daum, G. Knies, S. Schiek, J. Haack, I. O. Skillicorn, H. B. Dreis, M. Nyberg-Werther, T. R. Ebert, A. Fedotov, A. De Roeck, H. Henschel, H. Bergstein, S. D. Kolya, Th. Naumann, H. Duhm, E. Deffur, P. Kostka, M. David, M. Flieser, J. Stier, Y. Vazdik, L.R. West, David Milstead, S. Prell, Jan Hladky, I. Shevyakov, C. Schmidt, P. Di Nezza, Peter Robmann, L. Del Buono, F. Botterweck, D. Krcker, P. E. Reimer, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Particle physics, Photon, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), Proton, 010308 nuclear & particles physics, Compton scattering, Bremsstrahlung, Elementary particle, HERA, 01 natural sciences, 7. Clean energy, law.invention, Nuclear physics, law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Collider, Engineering (miscellaneous)
Abstract: We present an experimental study of theep→eγ+p andep→eγ+X processes using data recorded by the H1 detector in 1993 at the electron-proton collider HERA. These processes are employed to measure the luminosity with an accuracy of 4.5 %. A subsample of theep→eγ+X events in which the hard photon is detected at angles θγ′ ≤ 0.45 mrad with respect to the incident electron direction is used to verify experimentally the size of radiative corrections to theep→eX inclusive cross section and to investigate the structure of the proton in theQ2 domain down to 2 GeV2, lower than previously attained at HERA.

36. A search for selectrons and squarks at HERA

Author: Aid, S., Zsembery, J., Zuber, K., Zurnedden, M., Zimmer, M., Zomer, F., Zhokin, A., Zarbock, D., Zhiqing Zhang, Wunsch, E., Zacek, J., Yiou, T. P., Wittek, C., G Winter, G., Winde, M., Willard, S., Wilksen, T., Wellisch, H. P., West, L. R., Wegener, D., Wegner, A., Weber, M., Weber, G., Waugh, B., Walther, A., Wagener, M., Wagener, A., Wacker, K., Villet, G., Verrecchia, P., Vazdik, Y., Mechelen, P., Esch, P., Vandenplas, D., Vallee, C., Valkarova, A., Usik, A., Valkar, S., Tutas, J., Uelkes, P., Turnau, J., Truol, P., Thiebaux, C., Thompson, G., Theissen, J., Tchernyshov, V., Tchetchelnitski, S., Stolze, K., Tapprogge, S., Tasevsky, M., Straumann, U., Struczinski, W., Sutton, P., Stier, J., Stiewe, J., Stosslein, U., Steiner, H., Stella, B., Steffen, P., Steinberg, R., Steenbock, M., Squinabol, F., Starosta, R., Spiekermann, J., Spielman, S., Spitzer, H., Specka, A., Soloviev, Y., Solochenko, V., Smith, J. R., Smirnov, P., Sirois, Y., Skillicorn, I. O., Siewert, U., Sell, R., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Seidel, M., Sefkow, F., Schwab, B., Schumann, E., Schroder, V., Schmidt, G., Schoning, A., Semenov, A., Schmidt, D., Schlippe, W., Schleper, P., Schleif, S., Schiek, S., Schacht, P., Sankey, D. P. C., Sahlmann, N., Rybicki, K., Ruter, K., Rusakov, S., Rostovtsev, A., Rouse, F., Royon, C., Rosenbauer, K., Roosen, R., Roloff, H. E., Robmann, P., Robertson, S. M., Rizvi, E., Rietz, M., Riess, S., Riepenhausen, F., Riedlberger, J., Riech, V., Rick, H., Reinshagen, S., Reimer, P., Raupach, F., Radel, G., Prosi, R., Rabbertz, K., Prell, S., Pieuchot, A., Pitzl, D., Phillips, J. P., Perez, E., Pawletta, H., Peppel, E., Patel, G. D., Panitch, A., Pascaud, C., Panaro, E., Palmen, P., Ozerov, D., Obrock, U., Oakden, M., Oberlack, H., Olsson, J. E., Nyberg-Werther, M., Noyes, G. W., Nowak, G., Niggli, H., Nisius, R., Ch. Niedzballa, Niebuhr, C., Niebergall, F., Nicholls, T. C., Nguyen, H. K., Neyret, D., Newton, D., Newman, P. E., Th. Naumann, Naroska, B., Nahnhauer, R., Nagovizin, V., Murin, P., Muller, K., Muller, G., Muller, D., Mroczko, E., Morris, J. V., Moreau, F., Moeck, J., Milstead, D., Mikocki, S., Migliori, A., O Meyer, P., Meyer, H., Meyer, J., Merz, T., Meyer, A., Mehta, A., Meier, K., Maxfield, S. J., Mcmahon, S. J., Mavroidis, T., U Martyn, H., Martyniak, J., Masson, S., Martin, G., Roland Martin, Marshall, R., Martens, J., Marks, J., Maracek, R., Marage, P., Mani, S., Malinovski, E., Magnussen, N., Luke, D., Lubimov, V., Lopez, G. C., Lobo, G., Loch, P., Lohmander, H., Lomas, J. W., List, B., Link, J., Linsel, F., Lipinski, J., Levonian, S., Ch. Ley, Lindstrom, G., Lindstroem, M., Leverenz, C., F Laporte, J., Lebedev, A., Lehner, F., Langenegger, U., Lanius, P., Lange, W., Landon, M. P. J., Lamarche, F., Lander, R., Lacour, D., Laforge, B., Kurzhofer, J., Kurca, T., Kuster, H., Kuhlen, M., Kruger, U., Kruner-Marquis, U., Krucker, D., Krehbiel, H., Krasny, M. W., Kramerkamper, T., Kostka, P., Kotelnikov, S. K., Kolya, S. D., Korbel, V., Korn, M., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Ko, W., Kohler, T., Kohne, J. H., Kolanoski, H., Kole, F., Kaufmann, H. H., Kazarian, S., Johnson, D. P., Johnson, L., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kaschowitz, R., Kathage, U., Katzy, J., Jonsson, L., Johannsen, K., Hutte, M., Hufnagel, H., Ibbotson, M., Itterbeck, H., A Jabiol, M., Jacholkowska, A., Jacobsson, C., Jaffre, M., Janoth, J., Jansen, T., Holtom, T., Horisberger, R., Hoffmann, D., Hoppner, M., Hoeger, K. C., Hladky, J., Hilton, C. D., Hiller, H., Hildesheim, W., Hess, M. F., Herynek, I., Andreev, V., Andrieu, B., D Appuhn, R., Arpagaus, M., Babaev, A., Bahr, J., Ban, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Barth, M., Bassler, U., Beck, H. P., J Behred, H., Belousov, A., Ch. Berger, Bernardi, G., Bernet, R., Bertrand-Coremans, G., Besancon, M., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Blobel, V., Borras, K., Botterweck, F., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Bruncko, D., Brune, C., Buchholz, R., Bungener, L., Burger, J., Busser, F. W., Buniatian, A., Burke, S., Burton, M. J., Buschhorn, G., Campbell, A. J., Carli, T., Charles, F., Charlet, M., Clarke, D., Clegg, A. B., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., C Cousinou, M., Ch. Coutures, Cozzika, G., Criegee, L., Cussans, D. G., Cvach, J., Sylvie DAGORET, Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., Delcourt, B., Del Buono, L., Roeck, A., Wolf, E. A., Dirkmann, M., Dixon, P., Di Nezza, P., Dlugosz, W., Dollfus, C., Dowell, J. D., Dreis, H. B., Droutskoi, A., Duboc, J., Dullmann, D., Dunger, O., Duhm, H., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellison, R. J., Elsen, E., Erdmann, M., Erdmann, W., Evrard, E., Fahr, A. B., Favart, L., Fedotov, A., Feeken, D., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flugge, G., Fomenko, A., Fominykh, B., Forbush, M., Formanek, J., Foster, J. M., Franke, G., Fretwurst, E., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gellrich, A., Genzel, H., Gerhards, R., Glazov, A., Goerlach, U., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Golec-Biernat, K., Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grassler, H., Grassler, R., Greenshaw, T., Griffiths, R., Grindhammer, G., Gruber, A., Gruber, C., Haack, J., Haidt, D., Hajduk, L., Hamon, O., Hampel, M., Hapke, M., Haynes, W. J., Heinzelmann, J., Henderson, R. C. W., Henschel, H., Hudgson, V. L., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Missing energy, 010308 nuclear & particles physics, Hadron, High Energy Physics::Phenomenology, FOS: Physical sciences, Electron, HERA, 01 natural sciences, Lightest Supersymmetric Particle, High Energy Physics - Experiment, Selectron tube, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Transverse momentum, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment
Abstract: Data from electron-proton collisions at a center-of-mass energy of 300 GeV are used for a search for selectrons and squarks within the framework of the minimal supersymmetric model. The decays of selectrons and squarks into the lightest supersymmetric particle lead to final states with an electron and hadrons accompanied by large missing energy and transverse momentum. No signal is found and new bounds on the existence of these particles are derived. At 95% confidence level the excluded region extends to 65 GeV for selectron and squark masses, and to 40 GeV for the mass of the lightest supersymmetric particle., Comment: 13 pages, latex, 6 Figures

37. A SEARCH FOR LEPTOQUARKS AND SQUARKS AT HERA

Author: H. Bergstein, Th. Naumann, Daniel Pitzl, Wolfram Erdmann, H. Duhm, S. K. Kotelnikov, N. Magnussen, L. Hajduk, E. Gabathuler, N. Sahlmann, E. Deffur, P. Kostka, E. Schuhmann, T. Ahmed, J. Duboc, B. Stella, E. Malinovski, M. Kuhlen, G. Grindhammer, P. Biddulph, M. David, Didier Lacour, G. Müller, Armen Vartapetian, M. Colombo, P. Baranov, M. Fleischer, M. A. Jabiol, J. Riedlberger, D. Feeken, G. Pope, Peter Schleper, Carl R. Brune, M. Barth, Marc Besancon, A.S. Belousov, A. Lindner, J. Janoth, Sergey Rusakov, P. Truöl, Murrough Landon, A. E. Wright, Volker Blobel, R. Eichler, C. Keuker, J. Stier, K. C. Hoeger, D. Lüke, J. Marks, E. Wünsch, Y. Vazdik, Dave Sankey, U. Bassler, G. D. Patel, H. Meyer, L.R. West, R. J. Ellison, J. Martens, F. Kole, David Schmidt, H. Itterbeck, P. Van Mechelen, S. Eichenberger, V. Riech, R. Maraček, W. von Schlippe, K. Gabathuler, A. Buniatian, D. Wegener, R. Starosta, J. V. Morris, G. Schmidt, M. Forbush, A. Schwind, A. Lebedev, S. Egli, M. Rietz, D. Haidt, G. Heinzelmann, F. Charles, H. Küster, T. Merz, W.J. Haynes, P. Ribarics, R. Felst, U. Seehausen, F. Sefkow, M. Nyberg-Werther, T. Köhler, M. W. Krasny, Peter Robmann, M. F. Hess, S. Tapprogge, Mikhail Danilov, R. Roosen, T. R. Ebert, S. Reinshagen, J. Martyniak, W.D. Dau, J. B. Dainton, K. Stephens, E. Peppel, I. Sheviakov, A. Fedotov, Günter Flügge, T. P. Yiou, J. Turnau, C. Kiesling, U. Krüger, B. Fominykh, Emmanuelle Perez, V. Efremenko, S. Mikocki, M. Steenbock, A. De Roeck, A. J. Campbell, Eckhart Fretwurst, M. Flieser, H. Krehbiel, Richard E. Taylor, S. Dagoret, P. Goritchev, T. Kurča, L. N. Shtarkov, J. Feltesse, G. Buschhorn, B. Andrieu, O. Dünger, K. Gamerdinger, J. Ferencei, V I. Shekelyan, A. Panitch, Frank Raupach, G. Bertrand-Coremans, F. Botterweck, D. Neyret, K. Wacker, K. Rüter, C. Niebuhr, S. M. Robertson, S. Willard, R. Steinberg, T. Mavroidis, K. Rosenbauer, I. Tichomirov, D. Goldner, L. Criegee, Y. Soloviev, J. M. Foster, N. Wulff, R. Buchholz, David Milstead, P. A. Smirnov, J. Formánek, M. Savitsky, Wolfgang Lange, C. A. Meyer, J. Žáček, J. Garvey, M. Gebauer, H. E. Roloff, P. Kasselmann, B. Gonzalez-Pineiro, H. Hufnagel, G. Thompson, Dusan Bruncko, K. Zuber, M. Arpagaus, A. Gruber, M. Winde, B. Naroska, J. Gayler, P. Uelkes, Martin Erdmann, F. Ferrarotto, D. Düllmann, A. M. Fomenko, C.D. Hilton, J.G. Contreras, L. Johnson, U. Obrock, Daniel Johnson, H. Genzel, J. Cvach, H. Henschel, Leif J. Jönsson, H. J. Behrend, J.C. Bizot, M. Goldberg, F. Niebergall, L. Goerlich, E. Evrard, E. Sanchez, T. Greenshaw, R. L. Lander, H. Lohmander, K. Daum, J.P. Phillips, S. Mani, G. Villet, Pierre Marage, Stephen Maxfield, B. Delcourt, J. Stiewe, U. Stösslein, Vincent Hedberg, H. P. Beck, Stephen Burke, G. Knies, Rosario Martín, A. B. Clegg, R. Rylko, C. Leverenz, Andrew Mehta, S. Schiek, R. Marshall, N. Gogitidze, Dirk Krücker, O. Hamon, J. Haack, P. Van Esch, I. O. Skillicorn, H. B. Dreis, Zhen Zhang, A. Courau, A. Rostovtsev, R. Bernet, S. Kermiche, H. Shooshtari, R. Nisius, J. R. Smith, R. Herma, E. Eisenhandler, J. P. Sutton, Claus Kleinwort, J. Ebert, S. Levonian, M. Wagener, Ch. Ley, A. Walther, A. Usik, K. Flamm, A. Wegner, A. Gellrich, W. Zimmermann, P. I. P. Kalmus, J. Baehr, E. Panaro, J. Kurzhöfer, A. Wagener, J. D. Dowell, F. Lamarche, M. Jaffre, J. E. Olsson, V. Nagovizin, A. Braemer, R. Kaschowitz, W. Bartel, W. Hildesheim, J. P. Kubenka, Roland Horisberger, H. K. Nguyen, I. V. Gorelov, K. Müller, A. Valkárová, R. Grässler, Ch. Coutures, W. Struczinski, H. U. Martyn, Matthias Klein, F. W. Büsser, Hermann Kolanoski, D. Clarke, S. Riess, W. Braunschweig, G. W. Noyes, H. Spitzer, John A Coughlan, R. Sell, Horst Oberlack, I. R. Kenyon, S. Kazarian, K. Johannsen, U. Siewert, F. Zomer, A. M. Goodall, Christophe Royon, M. Zimmer, L. Del Buono, Vincent Boudry, P. Hill, Jean-Francois Laporte, V. Andreev, J. Bán, Winston Ko, C. Pascaud, Guenter Eckerlin, H. Ehrlichmann, André Schöning, Yves Sirois, C. Vallée, R. D. Appuhn, J. Lipinski, G. Franke, U. Krüner-Marquis, T. Jansen, G. Rädel, M. Hampel, B. Kuznik, Ph. Huet, Steve McMahon, Ch. Pichler, G. Lindström, C. Gruber, Paul Newman, Grzegorz Nowak, S. Aid, M. Korn, C. Jacobsson, D. Kant, G. Weber, U. Straumann, Kerstin Borras, A. Semenov, F. Linsel, J. Heatherington, M. Vecko, D. Newton, U. Kathage, D. Mercer, F. Brasse, V. Brisson, S. Masson, K. H. Hiller, M. Hapke, R. Nahnhauer, R. C. W. Henderson, P. Lanius, E. Barrelet, David Cussans, Markus Seidel, V. Tchernyshov, E. A. De Wolf, Ch. Berger, Karlheinz Meier, L. Büngener, V. Korbel, J. Tutas, J. D. Burger, I. Herynek, Jean-Arcady Meyer, Benno List, R. Gerhards, R. Prosi, G. Cozzika, F. Eisele, Stefan Valkar, G. Siegmon, Hannes Jung, R. Beyer, F. Moreau, J. Hladký, A. Jacholkowska, S. D. Kolya, P. Loch, P. E. Reimer, E. M. Hanlon, G. G. Winter, P. Verrecchia, V. Schröder, P. Steffen, H. H. Kaufmann, Eckhard Elsen, Peter Schacht, G. C. Lopez, D. Zarbock, H. P. Wellisch, Max Weber, Gregorio Bernardi, T. Carli, Anton Babaev, C. Thiebaux, I. W. Walker, J. Strachota, K. Rybicki, Christoph Grab, B. Schwab, Pavel Murin, H. Grässler, M. Ibbotson, Laurent Favart, C. Dollfus, F. Rouse, M. Höppner, S. Prell, Ulrich Goerlach, C. Schmidt, and P. Di Nezza
Subjects: Physics, Quark, Particle physics, Physics and Astronomy (miscellaneous), High Energy Physics::Phenomenology, Scalar (mathematics), Elementary particle, HERA, Standard Model, Nuclear physics, Particle decay, Grand Unified Theory, High Energy Physics::Experiment, Invariant mass, Engineering (miscellaneous)
Abstract: A search in the H1 experiment at HERA for scalar and vector leptoquarks, leptogluons and squarks coupling to first generation fermions is presented in a data sample corresponding to an integrated luminosity of 425 nb−1. For masses ranging up to ∼275 GeV, no significant evidence for the direct production of such particles is found in various possible decay channels. At high masses and beyond the centre of mass energy of 296 GeV a contact interaction analysis is used to further constrain the couplings and masses of new vector leptoquarks and to set lower limits on compositeness scales.

38. A MEASUREMENT OF MULTI-JET RATES IN DEEP-INELASTIC SCATTERING AT HERA

Author: M. Schulz, M. Nyberg, Paul Newman, J. Harjes, T. Jansen, W. Hildesheim, R. Marshall, Dirk Krücker, S. Willard, G. Rädel, K. C. Hoeger, M. Korn, J. Garvey, B. Kuznik, V. Riech, C. A. Meyer, A. M. Fomenko, M. Winde, J. Feltesse, M. Arpagaus, Ph. Huet, Ch. Pichler, G. Weber, Armen Vartapetian, U. Straumann, C. Zeitnitz, M. Hapke, L. Johnson, Dave Sankey, P. Fuhrmann, R. L. Lander, H. Bärwolff, K. Rauschnabel, Wolfgang Lange, S. Levonian, J. M. Foster, R. C. W. Henderson, Daniel Johnson, J. Duboc, B. Stella, A. Rostovtsev, H. Greif, M. Rudowicz, I. Abt, E. Binder, N. Huot, J. Tutas, J. D. Burger, R. Prosi, L. Goerlich, E. Evrard, Jean-Arcady Meyer, J. Gayler, M. Savitsky, G. D. Patel, W. Scobel, Max Klein, R. Gerhards, J. Turnau, K. Johannsen, Christophe Royon, Kerstin Borras, A. Semenov, E. Sanchez, E. Malinovski, M. Kuhlen, G. Grindhammer, P. E. Reimer, H. Meyer, S. Kermiche, K. Flamm, S. Eichenberger, A. Mavroidis, M. Steenbock, J. Cvach, B. Andrieu, David Schmidt, Th. Wolff, F. Linsel, J. Moreels, G. Siegmon, P. A. Smirnov, Alan Campbell, E. M. Hanlon, G. G. Winter, A. Wegner, Daniel Pitzl, D. Lüers, Pavel Staroba, R. Kaschowitz, D. Handschuh, J. Žáček, H. Ziaeepour, J. Kurzhöfer, K. Stephens, E. Peppel, H. Krehbiel, P. Steffen, F. Moreau, J. Hladký, N. Magnussen, J. Heatherington, C. Niebuhr, Peter Schacht, G. C. Lopez, A. Valkárová, S. Riess, V. Nagovizin, A. W. E. Dann, P. I. P. Kalmus, N. Sahlmann, T. R. Ebert, P. Verrecchia, F. Brasse, H. Shooshtari, J. V. Morris, Winston Ko, W. von Schlippe, D. Feeken, G. Buschhorn, A. Jacholkowska, A. Fedotov, W. Schmitz, Günter Flügge, H. T. Phillips, J. P. Kubenka, P. Hill, J. Bán, H. Spitzer, E. Barrelet, T. Merz, Stephen Maxfield, C. Pascaud, Guenter Eckerlin, R. Vick, P. Biddulph, R. Ebbinghaus, D. Newton, V. Schröder, S. D. Kolya, S. Reinshagen, M. A. Jabiol, T. P. Yiou, E. Vogel, Y. Soloviev, Gregorio Bernardi, S. Prell, Anton Babaev, Nicolas Ellis, André Schöning, H. H. Kaufmann, A. B. Clegg, Andrew Mehta, C. Kiesling, Ch. Berger, Eckhard Elsen, M. Forbush, J. Riedlberger, S. Kasarian, Karlheinz Meier, N. Gogitidze, H. P. Wellisch, C. Thiebaux, S. K. Kotelnikov, L. Hajduk, A. Schwind, I. F. Fensome, U. Bassler, R. J. Ellison, J. Strachota, B. Delcourt, L. Büngener, S. Mani, Leith Godfrey, Michel Devel, Vincent Hedberg, G. Knies, A. De Roeck, Richard E. Taylor, R. Langkau, Mario David, T. Carli, H. U. Martyn, V. Milone, U. Stösslein, I. W. Walker, K. Rybicki, I. Herynek, Dusan Bruncko, R. Bernet, H. P. Beck, Stephen Burke, A. Lebedev, S. Egli, L. Urban, T. Kurča, M. Ruffer, B. Naroska, S. Orenstein, F. Ferrarotto, H. Genzel, A. Lindner, R. Nisius, L.A. Womersley, A. Leuschner, Christoph Grab, Grzegorz Nowak, C. Jacobsson, Peter Loch, M. Rietz, D. Haidt, L. N. Shtarkov, G. W. Noyes, P. Lanius, P. Ribarics, T. Greenshaw, F. Zomer, A. M. Goodall, R. Felst, J.P. Phillips, Volker Blobel, A. Walther, C. Leverenz, R. Eichler, C. Keuker, Rosario Martín, J. Ferencei, J. Ebert, C. Schmidt, P. Dingus, U. Braun, R. D. Appuhn, Leif J. Jönsson, P. Van Esch, M. Flieser, W. Zimmermann, M. Vecko, L. Del Buono, J. Stier, V. Andreev, M. Fleischer, J. Haack, Didier Lacour, D. Mercer, M. Eberle, J. P. Sutton, Claus Kleinwort, J. R. Smith, I. O. Skillicorn, H. B. Dreis, F. Charles, J. Marks, G. Heinzelmann, F. Ould-Saada, H. Lohmander, V. Tchernyshov, Y. Vazdik, L.R. West, V. Korbel, U. Kathage, I. Sheviakov, R. Herma, O. Hamon, E. Eisenhandler, W. Pilgram, G. Villet, Ch. Ley, S. Masson, Pierre Marage, U. Krüger, Peter Robmann, M. Gennis, M. Colombo, J. Martens, A. Bischoff, V. Brisson, F. Kole, S. Dagoret, Yves Sirois, B. Schwab, H. Küster, H. Bergstein, L. Smolik, U. Seehausen, G. Lindström, Murrough Landon, A. E. Wright, Th. Naumann, Petr Zavada, C. Gruber, H. Duhm, V I. Shekelyan, R. Haydar, P. C. Bosetti, K. Wacker, R. Steinberg, Pavel Murin, H. Grässler, J. D. Dowell, A. Courau, W. Flauger, J. Lipinski, M. Ibbotson, E. Gabathuler, E. Deffur, H. K. Nguyen, P. Kostka, O. Dünger, G. Franke, S. A. Murray, Laurent Favart, I. V. Gorelov, K. Müller, C. Dollfus, R. Grässler, Ch. Coutures, W. Struczinski, H. Itterbeck, S. Peters, Ulrich Goerlach, P. Goritchev, Martin Erdmann, U. Obrock, F. Niebergall, K. Gamerdinger, D. Neyret, G. Thompson, Steve McMahon, W.D. Dau, J. B. Dainton, A. Drescher, D. Düllmann, Claire Bourdarios, H. Henschel, H. J. Behrend, J.C. Bizot, M. Goldberg, G. Cozzika, F. Eisele, Stefan Valkar, Hannes Jung, C. Vallée, T. Ahmed, P. Baranov, Peter Schleper, Marc Besancon, A.S. Belousov, Sergey Rusakov, P. Truöl, I. Tichomirov, H. Hufnagel, C.D. Hilton, Mikhail Danilov, D. Lewin, R. Roosen, J. Martyniak, Frank Raupach, B. Fominykh, A. Buniatian, D. Wegener, W.J. Haynes, Emmanuel Monnier, Eckhart Fretwurst, S. M. Robertson, T. Köhler, M. W. Krasny, N. Wulff, V. Efremenko, P. Kasselmann, S. Mikocki, M. Jaffre, J. E. Olsson, W. Bartel, F. W. Büsser, G. Bertrand-Coremans, W. Braunschweig, R. Sell, I. R. Kenyon, L. Criegee, J. Formánek, U. Siewert, M. Zimmer, Vincent Boudry, Jean-Francois Laporte, A. Gellrich, F. Lamarche, Hermann Kolanoski, D. Clarke, John A Coughlan, Horst Oberlack, and A. Usik
Subjects: Quantum chromodynamics, Physics, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, Detector, Momentum transfer, Elementary particle, HERA, Electron, Deep inelastic scattering, Nuclear physics, High Energy Physics::Experiment, Engineering (miscellaneous), Event generator
Abstract: Multi-jet production is observed in deep-inelastic electron proton scattering with the H1 detector at HERA. Jet rates for momentum transfers squared up to 500 GeV2 are determined using the JADE jet clustering algorithm. They are found to be in agreement with predictions from QCD based models.

39. Strangeness production in deep-inelastic positron-proton scattering at HERA

Author: Aid, S., Zsembery, J., Zuber, K., Zurnedden, M., Zimmer, M., Zomer, F., Zhokin, A., Zarbock, D., Zhiqing Zhang, Wunsch, E., Zacek, J., Yiou, T. P., Wittek, C., G Winter, G., Winde, M., Willard, S., Wilksen, T., Wellisch, H. P., West, L. R., Wegener, D., Wegner, A., Weber, M., Weber, G., Waugh, B., Walther, A., Wagener, M., Wagener, A., Wacker, K., Villet, G., Verrecchia, P., Vazdik, Y., Mechelen, P., Esch, P., Vandenplas, D., Vallee, C., Valkarova, A., Usik, A., Valkar, S., Tutas, J., Uelkes, P., Turnau, J., Truol, P., Thiebaux, C., Thompson, G., Theissen, J., Tchernyshov, V., Tchetchelnitski, S., Stolze, K., Tapprogge, S., Tasevsky, M., Straumann, U., Struczinski, W., Sutton, P., Stier, J., Stiewe, J., Stosslein, U., Steiner, H., Stella, B., Steffen, P., Steinberg, R., Steenbock, M., Squinabol, F., Starosta, R., Spiekermann, J., Spielman, S., Spitzer, H., Specka, A., Soloviev, Y., Solochenko, V., Smith, J. R., Smirnov, P., Sirois, Y., Skillicorn, I. O., Siewert, U., Sell, R., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Seidel, M., Sefkow, F., Schwab, B., Schumann, E., Schroder, V., Schmidt, G., Schoning, A., Semenov, A., Schmidt, D., Schlippe, W., Schleper, P., Schleif, S., Schiek, S., Schacht, P., Sankey, D. P. C., Sahlmann, N., Rybicki, K., Ruter, K., Rusakov, S., Rostovtsev, A., Rouse, F., Royon, C., Rosenbauer, K., Roosen, R., Roloff, H. E., Robmann, P., Robertson, S. M., Rizvi, E., Rietz, M., Riess, S., Riepenhausen, F., Riedlberger, J., Riech, V., Rick, H., Reinshagen, S., Reimer, P., Raupach, F., Radel, G., Prosi, R., Rabbertz, K., Prell, S., Pieuchot, A., Pitzl, D., Phillips, J. P., Perez, E., Pawletta, H., Peppel, E., Patel, G. D., Panitch, A., Pascaud, C., Panaro, E., Palmen, P., Ozerov, D., Obrock, U., Oakden, M., Oberlack, H., Olsson, J. E., Nyberg-Werther, M., Noyes, G. W., Nowak, G., Niggli, H., Nisius, R., Ch. Niedzballa, Niebuhr, C., Niebergall, F., Nicholls, T. C., Nguyen, H. K., Neyret, D., Newton, D., Newman, P. E., Th. Naumann, Naroska, B., Nahnhauer, R., Nagovizin, V., Murin, P., Muller, K., Muller, G., Muller, D., Mroczko, E., Morris, J. V., Moreau, F., Moeck, J., Milstead, D., Mikocki, S., Migliori, A., O Meyer, P., Meyer, H., Meyer, J., Merz, T., Meyer, A., Mehta, A., Meier, K., Maxfield, S. J., Mcmahon, S. J., Mavroidis, T., U Martyn, H., Martyniak, J., Masson, S., Martin, G., Roland Martin, Marshall, R., Martens, J., Marks, J., Maracek, R., Marage, P., Mani, S., Malinovski, E., Magnussen, N., Luke, D., Lubimov, V., Lopez, G. C., Lobo, G., Loch, P., Lohmander, H., Lomas, J. W., List, B., Link, J., Linsel, F., Lipinski, J., Levonian, S., Ch. Ley, Lindstrom, G., Lindstroem, M., Leverenz, C., F Laporte, J., Lebedev, A., Lehner, F., Langenegger, U., Lanius, P., Lange, W., Landon, M. P. J., Lamarche, F., Lander, R., Lacour, D., Laforge, B., Kurzhofer, J., Kurca, T., Kuster, H., Kuhlen, M., Kruger, U., Kruner-Marquis, U., Krucker, D., Krehbiel, H., Krasny, M. W., Kramerkamper, T., Kostka, P., Kotelnikov, S. K., Kolya, S. D., Korbel, V., Korn, M., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Ko, W., Kohler, T., Kohne, J. H., Kolanoski, H., Kole, F., Kaufmann, H. H., Kazarian, S., Johnson, D. P., Johnson, L., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kaschowitz, R., Kathage, U., Katzy, J., Jonsson, L., Johannsen, K., Hutte, M., Hufnagel, H., Ibbotson, M., Itterbeck, H., A Jabiol, M., Jacholkowska, A., Jacobsson, C., Jaffre, M., Janoth, J., Jansen, T., Holtom, T., Horisberger, R., Hoffmann, D., Hoppner, M., Hoeger, K. C., Hladky, J., Hilton, C. D., Hiller, H., Hildesheim, W., Hess, M. F., Herynek, I., Andreev, V., Andrieu, B., D Appuhn, R., Arpagaus, M., Babaev, A., Bahr, J., Ban, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Barth, M., Bassler, U., Beck, H. P., J Behred, H., Belousov, A., Ch. Berger, Bernardi, G., Bernet, R., Bertrand-Coremans, G., Besancon, M., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Blobel, V., Borras, K., Botterweck, F., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Bruncko, D., Brune, C., Buchholz, R., Bungener, L., Burger, J., Busser, F. W., Buniatian, A., Burke, S., Burton, M. J., Buschhorn, G., Campbell, A. J., Carli, T., Charles, F., Charlet, M., Clarke, D., Clegg, A. B., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., C Cousinou, M., Ch. Coutures, Cozzika, G., Criegee, L., Cussans, D. G., Cvach, J., Sylvie DAGORET, Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., Delcourt, B., Del Buono, L., Roeck, A., Wolf, E. A., Dirkmann, M., Dixon, P., Di Nezza, P., Dlugosz, W., Dollfus, C., Dowell, J. D., Dreis, H. B., Droutskoi, A., Duboc, J., Dullmann, D., Dunger, O., Duhm, H., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellison, R. J., Elsen, E., Erdmann, M., Erdmann, W., Evrard, E., Fahr, A. B., Favart, L., Fedotov, A., Feeken, D., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flugge, G., Fomenko, A., Fominykh, B., Forbush, M., Formanek, J., Foster, J. M., Franke, G., Fretwurst, E., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gellrich, A., Genzel, H., Gerhards, R., Glazov, A., Goerlach, U., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Golec-Biernat, K., Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grassler, H., Grassler, R., Greenshaw, T., Griffiths, R., Grindhammer, G., Gruber, A., Gruber, C., Haack, J., Haidt, D., Hajduk, L., Hamon, O., Hampel, M., Hapke, M., Haynes, W. J., Heinzelmann, J., Henderson, R. C. W., Henschel, H., Hudgson, V. L., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Meson, 010308 nuclear & particles physics, Scattering, Hadron, FOS: Physical sciences, Strangeness production, HERA, 01 natural sciences, High Energy Physics - Experiment, Baryon, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics
Abstract: Measurements are presented of $K^0$ meson and $��$ baryon production in deep-inelastic positron-proton scattering (DIS) in the kinematic range $10 < Q^2 < 70 $GeV$^2$ and $10^{-4} < x < 10^{-2}$. The measurements, obtained using the H1 detector at the HERA collider, are discussed in the light of possible mechanisms for increased strangeness production at low Bjorken-$x$. Comparisons of the $x_F$ spectra, where $x_F$ is the fractional longitudinal momentum in the hadronic centre-of-mass frame, with results from electron-positron annihilation are made. The $x_F$ spectra and the $K^0$ ``seagull'' plot are compared with previous DIS results. The mean $K^0$ and $��$ multiplicities are studied as a function of the centre-of-mass energy $W$ and are observed to be consistent with a logarithmic increase with $W$ when compared with previous measurements. A comparison of the levels of strangeness production in diffractive and non-diffractive DIS is made. An upper limit of $0.9 $nb, at the 95% confidence level, is placed on the cross-section for QCD instanton induced events., 36 pages, latex, 15 Figures

40. A search for squarks of Rp-violating SUSY at HERA

Author: Aid, S., Zsembery, J., Zuber, K., Zurnedden, M., Zimmer, M., Zomer, F., Zhokin, A., Zarbock, D., Zhiqing Zhang, Wunsch, E., Zacek, J., Yiou, T. P., Wittek, C., G Winter, G., Winde, M., Willard, S., Wilksen, T., Wellisch, H. P., West, L. R., Wegener, D., Wegner, A., Weber, M., Weber, G., Waugh, B., Walther, A., Wagener, M., Wagener, A., Wacker, K., Villet, G., Verrecchia, P., Vazdik, Y., Mechelen, P., Esch, P., Vandenplas, D., Vallee, C., Valkarova, A., Usik, A., Valkar, S., Tutas, J., Uelkes, P., Turnau, J., Truol, P., Thiebaux, C., Thompson, G., Theissen, J., Tchernyshov, V., Tchetchelnitski, S., Stolze, K., Tapprogge, S., Tasevsky, M., Straumann, U., Struczinski, W., Sutton, P., Stier, J., Stiewe, J., Stosslein, U., Steiner, H., Stella, B., Steffen, P., Steinberg, R., Steenbock, M., Squinabol, F., Starosta, R., Spiekermann, J., Spielman, S., Spitzer, H., Specka, A., Soloviev, Y., Solochenko, V., Smith, J. R., Smirnov, P., Sirois, Y., Skillicorn, I. O., Siewert, U., Sell, R., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Seidel, M., Sefkow, F., Schwab, B., Schumann, E., Schroder, V., Schmidt, G., Schoning, A., Semenov, A., Schmidt, D., Schlippe, W., Schleper, P., Schleif, S., Schiek, S., Schacht, P., Sankey, D. P. C., Sahlmann, N., Rybicki, K., Ruter, K., Rusakov, S., Rostovtsev, A., Rouse, F., Royon, C., Rosenbauer, K., Roosen, R., Roloff, H. E., Robmann, P., Robertson, S. M., Rizvi, E., Rietz, M., Riess, S., Riepenhausen, F., Riedlberger, J., Riech, V., Rick, H., Reinshagen, S., Reimer, P., Raupach, F., Radel, G., Prosi, R., Rabbertz, K., Prell, S., Pieuchot, A., Pitzl, D., Phillips, J. P., Perez, E., Pawletta, H., Peppel, E., Patel, G. D., Panitch, A., Pascaud, C., Panaro, E., Palmen, P., Ozerov, D., Obrock, U., Oakden, M., Oberlack, H., Olsson, J. E., Nyberg-Werther, M., Noyes, G. W., Nowak, G., Niggli, H., Nisius, R., Ch. Niedzballa, Niebuhr, C., Niebergall, F., Nicholls, T. C., Nguyen, H. K., Neyret, D., Newton, D., Newman, P. E., Th. Naumann, Naroska, B., Nahnhauer, R., Nagovizin, V., Murin, P., Muller, K., Muller, G., Muller, D., Mroczko, E., Morris, J. V., Moreau, F., Moeck, J., Milstead, D., Mikocki, S., Migliori, A., O Meyer, P., Meyer, H., Meyer, J., Merz, T., Meyer, A., Mehta, A., Meier, K., Maxfield, S. J., Mcmahon, S. J., Mavroidis, T., U Martyn, H., Martyniak, J., Masson, S., Martin, G., Roland Martin, Marshall, R., Martens, J., Marks, J., Maracek, R., Marage, P., Mani, S., Malinovski, E., Magnussen, N., Luke, D., Lubimov, V., Lopez, G. C., Lobo, G., Loch, P., Lohmander, H., Lomas, J. W., List, B., Link, J., Linsel, F., Lipinski, J., Levonian, S., Ch. Ley, Lindstrom, G., Lindstroem, M., Leverenz, C., F Laporte, J., Lebedev, A., Lehner, F., Langenegger, U., Lanius, P., Lange, W., Landon, M. P. J., Lamarche, F., Lander, R., Lacour, D., Laforge, B., Kurzhofer, J., Kurca, T., Kuster, H., Kuhlen, M., Kruger, U., Kruner-Marquis, U., Krucker, D., Krehbiel, H., Krasny, M. W., Kramerkamper, T., Kostka, P., Kotelnikov, S. K., Kolya, S. D., Korbel, V., Korn, M., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Ko, W., Kohler, T., Kohne, J. H., Kolanoski, H., Kole, F., Kaufmann, H. H., Kazarian, S., Johnson, D. P., Johnson, L., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kaschowitz, R., Kathage, U., Katzy, J., Jonsson, L., Johannsen, K., Hutte, M., Hufnagel, H., Ibbotson, M., Itterbeck, H., A Jabiol, M., Jacholkowska, A., Jacobsson, C., Jaffre, M., Janoth, J., Jansen, T., Holtom, T., Horisberger, R., Hoffmann, D., Hoppner, M., Hoeger, K. C., Hladky, J., Hilton, C. D., Hiller, H., Hildesheim, W., Hess, M. F., Herynek, I., Andreev, V., Andrieu, B., D Appuhn, R., Arpagaus, M., Babaev, A., Bahr, J., Ban, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Barth, M., Bassler, U., Beck, H. P., J Behred, H., Belousov, A., Ch. Berger, Bernardi, G., Bernet, R., Bertrand-Coremans, G., Besancon, M., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Blobel, V., Borras, K., Botterweck, F., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Bruncko, D., Brune, C., Buchholz, R., Bungener, L., Burger, J., Busser, F. W., Buniatian, A., Burke, S., Burton, M. J., Buschhorn, G., Campbell, A. J., Carli, T., Charles, F., Charlet, M., Clarke, D., Clegg, A. B., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., C Cousinou, M., Ch. Coutures, Cozzika, G., Criegee, L., Cussans, D. G., Cvach, J., Sylvie DAGORET, Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., Delcourt, B., Del Buono, L., Roeck, A., Wolf, E. A., Dirkmann, M., Dixon, P., Di Nezza, P., Dlugosz, W., Dollfus, C., Dowell, J. D., Dreis, H. B., Droutskoi, A., Duboc, J., Dullmann, D., Dunger, O., Duhm, H., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellison, R. J., Elsen, E., Erdmann, M., Erdmann, W., Evrard, E., Fahr, A. B., Favart, L., Fedotov, A., Feeken, D., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flugge, G., Fomenko, A., Fominykh, B., Forbush, M., Formanek, J., Foster, J. M., Franke, G., Fretwurst, E., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gellrich, A., Genzel, H., Gerhards, R., Glazov, A., Goerlach, U., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Golec-Biernat, K., Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grassler, H., Grassler, R., Greenshaw, T., Griffiths, R., Grindhammer, G., Gruber, A., Gruber, C., Haack, J., Haidt, D., Hajduk, L., Hamon, O., Hampel, M., Hapke, M., Haynes, W. J., Heinzelmann, J., Henderson, R. C. W., Henschel, H., Hudgson, V. L., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), H1, Kerec, Hélène, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (miscellaneous), FOS: Physical sciences, Lambda, 01 natural sciences, High Energy Physics - Experiment, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Coupling, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Yukawa potential, HERA, Supersymmetry, Coupling (probability), Pair production, High Energy Physics::Experiment, Production (computer science), Free parameter, Minimal Supersymmetric Standard Model
Abstract: A search for squarks of R-parity violating supersymmetry is performed in $ep$ collisions at HERA using H1 1994 $e^+$ data. Direct single production of squarks of each generation by $e^+$-quark fusion via a Yukawa coupling $\lambda'$ is considered. All possible R-parity violating decays and gauge decays of the squarks are taken into account. No significant deviation from the Standard Model predictions is found in the various multi-lepton and multi-jet final states studied and exclusion limits are derived. At 95% confidence level, the existence of first generation squarks is excluded for masses up to $240 \GeV $ for coupling values $\lambda' \gtrsim \sqrt{4\pi \alpha_{em}}$.The limits obtained are shown to be only weakly dependent on the free parameters of the Minimal Supersymmetric Standard Model. Stop squarks are excluded for masses up to $138 \GeV$ for coupling $\lambda' \times \cos \theta_t$ to $e^+d$ pairs $\gtrsim 0.1 \times \sqrt{4\pi \alpha_{em}}$, where $\theta_t$ is the mass mixing angle. Light stop squarks are furthermore searched for through pair production in $\gamma$-gluon fusion processes. No signal is observed and exclusion limits are derived. Masses in the range 9 to $24.4 \GeV$ are excluded at 95% confidence level for $\lambda' \times \cos \theta_t > 10^{-4}$., Comment: 31 pages, latex, 11 Figures

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