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1. Search for light gravitinos in events with photons and missing transverse momentum at HERA

Author

V. Yeganov, D. Kant, P. E. Reimer, F. Moreau, G. G. Winter, Laurent Schoeffel, Dusan Bruncko, J. Wagner, Katerina Lipka, B. Naroska, J. Kroseberg, V. Lubimov, Pierre Marage, Murrough Landon, J. Böhme, T. Kluge, V. Tchoulakov, S. Gorbounov, I. R. Kenyon, Karel Cerny, H. U. Martyn, F. Zomer, A. Uraev, V. Andreev, H. Spitzer, Yves Sirois, T. Greenshaw, Erika Garutti, G. Franke, K. Nankov, L. N. Shtarkov, J. Ferencei, M. Martisikova, J. Naumann, I. Foresti, G. Cozzika, Georgios Tsipolitis, M. Fleischer, P. Van Mechelen, R. Weber, J. Marks, Claus Kleinwort, R. D. Heuer, Klaus Desch, Stefan Valkar, B. Olivier, Roland Horisberger, A. Valkárová, H.-B. Bröker, Hannes Jung, D.P. Brown, J. Haller, O. Henshaw, V. Jemanov, Paul Laycock, E. Malinovski, T. Laštovička, A. D.R. Vargas Trevino, A. Dubak, A. Rimmer, C. Wissing, Alexander Zhokin, S. Baumgartner, C. Niebuhr, J. Becker, Adrian Perieanu, C. Vallée, A. Lebedev, O. Behnke, Emmanuel Sauvan, A. Knutsson, S. Levonian, E. Barrelet, Z. Rurikova, Bogdan Povh, F. Sefkow, G. Grindhammer, J. Dingfelder, I. Sheviakov, S. Schmitt, Y. Vazdik, Daniel Pitzl, S. Egli, Y. R. Coppens, P. Baranov, D. Traynor, K. Daum, A. Asmone, K. H. Hiller, R. C. W. Henderson, N. Werner, F. Cassol-Brunner, E. A. De Wolf, Ch. Berger, C. Risler, R. Roosen, E. Perez, D. Haidt, David South, F. Tomasz, G. Knies, L. Hajduk, A. Aktas, Anton Babaev, J. G. Contreras, M. Urban, M. Jacquet, A. Mohamed, G. Weber, U. Straumann, I. Herynek, Thorsten Lux, L. Janauschek, N. Van Remortel, A. Nikiforov, V. Korbel, P.D. Thompson, M. Schneider, Stefania Xella, G. Thompson, Y. Soloviev, Leif J. Jönsson, Benoit Roland, T. Klimkovich, M. Peez, V. Volchinski, J. Zálešák, V. Spaskov, J. Kückens, K. Wacker, Peter Schleper, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, Martin Karlsson, C. Pascaud, P. Truöl, Paul Richard Newman, Guenter Eckerlin, A. Specka, H. Meyer, R. Demirchyan, C. Gwilliam, R. Pöschl, L. Bystritskaya, Eram Rizvi, H. Henschel, F. P. Schilling, Grzegorz Nowak, I. Milcewicz-Mika, Rainer Stamen, R. Koutouev, A. Petrukhin, Xavier Janssen, R. Marshall, J.C. Bizot, Th. Naumann, H. Zohrabyan, G. Heinzelmann, R. Plačakytė, W. Yan, K. Meier, Gero Flucke, M. Kapichine, M. Nozicka, K. Rybicki, A. Vest, O. Behrendt, V. Dodonov, N. Loktionova, V. Chekelian, S. Vinokurova, Pavel Murin, H. Grässler, J. Cvach, I. Strauch, M. Ibbotson, V. Nagovizin, J-P. Meyer, Judith Katzy, A. Makankine, N. Keller, G. Buschhorn, A. Hovhannisyan, J. Scheins, R. Lemrani, B. Delcourt, E. Gabathuler, Philipp Fleischmann, Laurent Favart, Christoph Grab, C. Werner, Y.H. Fleming, V. Lendermann, V. Schröder, L. Lytkin, T. Anthonis, D. Ozerov, I. Tsurin, B. Portheault, P. Kostka, Peter Robmann, Cristinel Diaconu, V. Brisson, J. Garvey, E. E. Elsen, J. Turnau, W.D. Dau, J. B. Dainton, S. Schätzel, A. Schöning, D. Lüke, C. Duprel, P. Höting, E. Wünsch, A. M. Fomenko, B. Leißner, A. Rostovtsev, Dave Sankey, M. Beckingham, Matthias Ulrich Mozer, A. Fedotov, D. Utkin, B. Reisert, G. D. Patel, C. Gerlich, Günter Flügge, M.-O. Boenig, J. Bähr, Wolfram Erdmann, B. List, S. Backovic, Max Klein, S. Ginzburgskaya, C. Kiesling, D.P. Johnson, A. De Roeck, E. Tzamariudaki, A. J. Campbell, H. Lueders, Stephen Maxfield, N. Malden, S. Mangano, M. Ismail, David Milstead, P. A. Smirnov, Wolfgang Lange, J. Stiewe, J. V. Morris, C. Veelken, S. Schmidt, A. Bunyatyan, J. Gayler, Andrew Mehta, J. Bracinik, N. Gogitidze, Nicolas Berger, Ewelina Lobodzinska, M. Wessels, S. Ghazaryan, M. Ellerbrock, G. Herrera, Bradley Cox, R. Wolf, B. Wessling, Anna Kropivnitskaya, Alexander Paramonov, R. Felst, A. Zhelezov, K. Müller, Christian Schwanenberger, John A Coughlan, S. Caron, Magnus Hansson, D.K. Nikitin, L. Goerlich, B. Stella, K. Gabathuler, D. Wegener, V. Efremenko, B. Koblitz, S. Mikocki, J. Formánek, R. Gerhards, K. Krüger, J. Žáček, Hans-Christian Schultz-Coulon, R. Eichler, E.-E. Woehrling, F. Eisele, R. Oganezov, K. Sedlák, J. E. Olsson, W. Bartel, Malte Hildebrandt, F. W. Büsser, T. Berndt, Natasa Raicevic, Vincent Boudry, A. N. Morozov, M. Gregori, Zhen Zhang, Ricardo Lopez-Fernandez, D. Hoffmann, Andreas Meyer, D. Meer, A. Usik, G. Frising, L. Lindfeld, 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), 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), 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, 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), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Yukawa potential, FOS: Physical sciences, HERA, 01 natural sciences, Lightest Supersymmetric Particle, Supersymmetry breaking, High Energy Physics - Experiment, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), Selectron tube, 0103 physical sciences, Neutralino, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Gravitino, 010306 general physics
Abstract

A search for gravitinos produced in e±p collisions is performed using the H1 detector at HERA. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3 pb -1 for e+p collisions and 13.5 pb-1 for e -p collisions. If R-parity is not conserved, the t-channel exchange of a selectron can produce a neutralino, which, in models where the gravitino is the lightest supersymmetric particle, subsequently decays into a photon and a light gravitino. The resulting event signature, which involves an isolated photon, a jet and missing transverse energy, is analysed for the first time at HERA. No deviation from the Standard Model is found. Exclusion limits on the cross section and on R-parity-violating Yukawa couplings are derived in a Gauge Mediated Supersymmetry Breaking scenario. The results are independent of the squark sector. Neutralinos and supersymmetric partners of the left-handed electron with masses up to 112 GeV and 164 GeV, respectively, can be ruled out at the 95% confidence level for R-parity-violating couplings λ′ equal to 1, in some parts of the parameter space of the considered model. © 2005 Elsevier B.V. All rights reserved., 0, DESY-04-227 / hep-ex/0501030, SCOPUS: ar.j, H1 Collaboration., info:eu-repo/semantics/published

Published
2005

2. Search for bosonic stop decays in R-parity violating supersymmetry in e+p collisions at HERA

Author

J. Wagner, J. Böhme, Karel Cerny, A. Uraev, M. Beckingham, Stephen Maxfield, J. Stiewe, Matthias Ulrich Mozer, Wolfgang Lange, Pierre Marage, A. Fedotov, Günter Flügge, V. Lubimov, S. Ginzburgskaya, J. Gayler, A. Lebedev, R. Plačakytė, C. Kiesling, A. De Roeck, E. Tzamariudaki, A. J. Campbell, C. Veelken, Andrew Mehta, J. Bracinik, K. Nankov, L. N. Shtarkov, V. Korbel, N. Gogitidze, D. Haidt, T. Laštovička, Laurent Schoeffel, R. Weber, G. Ossoskov, P. E. Reimer, E. Barrelet, N. Keller, Paul Laycock, E. Malinovski, A. Vest, G. Weber, U. Straumann, C. Werner, Z. Rurikova, Murrough Landon, O. Behnke, Emmanuel Sauvan, O. Behrendt, G. Grindhammer, E. A. De Wolf, Ch. Berger, Peter Robmann, T. J. Sloan, S. Vinokurova, V. Lendermann, J. Dingfelder, S. Gorbounov, R. Lemrani, P. Kostka, Eram Rizvi, B. Portheault, K. H. Hiller, R. C. W. Henderson, G. G. Winter, N. Werner, V. Schröder, M.-O. Boenig, T. Kuhr, Dusan Bruncko, J. Turnau, G. Heinzelmann, B. Naroska, I. Herynek, S. Levonian, R. Roosen, E. E. Elsen, V. Dodonov, P. Van Mechelen, T. Kluge, O. Henshaw, Paul Richard Newman, Grzegorz Nowak, A. Dubak, T. Greenshaw, Erika Garutti, A. Rostovtsev, V. Jemanov, S. Backovic, R. D. Heuer, R. Koutouev, A. Petrukhin, H. Lueders, S. Mangano, Y. Vazdik, M. Wessels, L. Lytkin, P.D. Thompson, M. Ellerbrock, M. Schneider, Cristinel Diaconu, Stefania Xella, J. Ferencei, G. Herrera, I. Morozov, M. Martisikova, J. Naumann, David South, Bradley Cox, J. Marks, I. R. Kenyon, R. Wolf, Alexander Paramonov, L. Bystritskaya, Y. R. Coppens, C. Pascaud, B. Stella, H. Spitzer, K. Daum, F. Tomasz, K. Krüger, Claus Kleinwort, Nicolas Berger, Th. Naumann, Gero Flucke, J. Kennedy, V. Brisson, G. Knies, M. Kapichine, M. Nozicka, H. Zohrabyan, B. Wessling, C. Risler, Guenter Eckerlin, I. Sheviakov, S. Schmitt, A. Nikiforov, E. Gabathuler, D. Lüke, Roland Horisberger, A. Valkárová, Daniel Pitzl, D. Traynor, A. Asmone, A. Schöning, M. Jacquet, E. Wünsch, Rainer Stamen, A. Specka, J. Zálešák, B. Delcourt, V. Spaskov, S. Baumgartner, I. Strauch, Philipp Fleischmann, Dave Sankey, D. Utkin, F. Cassol-Brunner, L. Hajduk, J. Kückens, K. Wacker, Martin Erdmann, M. Urban, J. Kroseberg, Anton Babaev, C. Gwilliam, S. Schätzel, S. Caron, A. Zhelezov, B. Roland, K. Müller, R. Pöschl, I. Milcewicz-Mika, Leif J. Jönsson, Christian Schwanenberger, B. Reisert, J. Bähr, P. Baranov, G. D. Patel, Adrian Perieanu, J. G. Contreras, A. Aktas, Martin Karlsson, R. Marshall, C. Niebuhr, Peter Schleper, T. Klimkovich, V. Chekelian, M. Peez, A. Mohamed, V. Nagovizin, H. U. Martyn, Georgios Tsipolitis, K. Meier, M. Fleischer, B. Olivier, N. Malden, J. Cvach, G. Thompson, S. Egli, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, Y. Soloviev, Max Klein, A. Makankine, G. Buschhorn, P. Höting, D. Ozerov, D.P. Brown, J. Haller, Pavel Murin, H. Grässler, W. Yan, J. V. Morris, D. Kant, Judith Katzy, Y.H. Fleming, H. Henschel, A. Bunyatyan, M. Ibbotson, N. Loktionova, V. Yeganov, Bogdan Povh, F. Sefkow, J.C. Bizot, A. Hovhannisyan, D.K. Nikitin, V. Volchinski, F. P. Schilling, Katerina Lipka, C. Duprel, I. Tsurin, I. Foresti, G. Cozzika, M. Ismail, David Milstead, V. Tchoulakov, P. A. Smirnov, C. Wissing, H. Meyer, R. Demirchyan, Stefan Valkar, J. Garvey, K. Rybicki, Laurent Favart, T. Anthonis, F. Moreau, H.-B. Bröker, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, Xavier Janssen, A. M. Fomenko, C. Gerlich, Christoph Grab, A. D.R. Vargas Trevino, J. Scheins, Klaus Desch, Thorsten Lux, L. Janauschek, N. Van Remortel, A. Rimmer, W.D. Dau, J. B. Dainton, A. Knutsson, B. Leißner, E. Perez, R. Gerhards, J. Formánek, Wolfram Erdmann, B. List, K. Gabathuler, D. Wegener, S. Ghazaryan, V. Efremenko, B. Koblitz, S. Mikocki, S. Schmidt, John A Coughlan, F. Zomer, V. Andreev, Magnus Hansson, Yves Sirois, G. Franke, Daniel Johnson, L. Goerlich, F. Eisele, R. Oganezov, K. Sedlák, Ewelina Lobodzinska, Anna Kropivnitskaya, R. Felst, J. Žáček, Hans-Christian Schultz-Coulon, R. Eichler, E.-E. Woehrling, L. Lindfeld, J. E. Olsson, W. Bartel, Malte Hildebrandt, F. W. Büsser, T. Berndt, Natasa Raicevic, Vincent Boudry, A. N. Morozov, M. Gregori, Zhen Zhang, Ricardo Lopez-Fernandez, J-P. Meyer, D. Hoffmann, Andreas Meyer, D. Meer, A. Usik, and G. Frising

Subjects
Quark, Physics, Nuclear and High Energy Physics, Particle physics, High Energy Physics::Phenomenology, Hadron, Scalar (mathematics), Yukawa potential, Supersymmetry, HERA, Nuclear physics, R-parity, High Energy Physics::Experiment, Minimal Supersymmetric Standard Model
Abstract

A search for scalar top quarks in R-parity violating supersymmetry is performed in e(+)p collisions at HERA using the H1 detector. The data, taken at roots = 319 GeV and 301 GeV, correspond to an integrated luminosity of 106 pb(-1). The resonant production of scalar top quarks t in positron quark fusion via an R-parity violating Yukawa coupling lambda' is considered with the subsequent bosonic stop decay t --> BW. The R-parity violating decay of the sbottom quark b --> dv(e) and leptonic and hadronic W decays are considered. No evidence for stop production is found in the search for bosonic stop decays nor in a search for the direct R-parity violating decay t --> eq. Mass dependent limits on lambda' are obtained in the framework of the minimal supersymmetric Standard Model. Stop quarks with masses up to 275 GeV can be excluded at the 95% confidence level for a Yukawa coupling of electromagnetic strength. (C) 2004 Elsevier B.V. All rights reserved.

Published
2004

3. Measurement of the proton structure function F2 at low Q2 in QED Compton scattering at HERA

Author

W. Yan, N. Loktionova, A. D.R. Vargas Trevino, Paul Richard Newman, Grzegorz Nowak, A. Hovhannisyan, R. Koutouev, A. Petrukhin, Laurent Schoeffel, J. Žáček, I. R. Kenyon, R. Plačakytė, I. Foresti, G. Cozzika, I. Sheviakov, S. Schmitt, M. Jacquet, I. Tsurin, H. Spitzer, Pierre Marage, S. Levonian, E. Perez, P. Höting, Hans-Christian Schultz-Coulon, Murrough Landon, Stefan Valkar, S. Schmidt, Z. Ratiani, Ewelina Lobodzinska, C. Wissing, N. Keller, K. Gabathuler, I. Milcewicz-Mika, H.-B. Bröker, Hannes Jung, R. Gerhards, V. Lendermann, V. Schröder, S. Gorbounov, Anna Kropivnitskaya, R. Felst, D. Wegener, V. Korbel, R. Eichler, J. Kennedy, V. Brisson, C. Niebuhr, Alexander Zhokin, J. Becker, Caroline Collard, J. Zálešák, S. Egli, J. V. Morris, V. Spaskov, Adrian Perieanu, C. Vallée, R. Heremans, E.-E. Woehrling, H. U. Martyn, B. Portheault, Matthias Klein, Y. Soloviev, O. Behnke, P. E. Reimer, David South, Magnus Hansson, J. Kückens, K. Wacker, A. Bunyatyan, L. Goerlich, E. E. Elsen, S. Baumgartner, V. Volchinski, Th. Naumann, P. Van Mechelen, Pavel Murin, H. Grässler, Daniel Pitzl, V. Lubimov, V. Efremenko, D. Traynor, B. Koblitz, M. Ibbotson, F. P. Schilling, Thorsten Lux, L. Janauschek, H. Meyer, R. Demirchyan, T. Laštovička, N. Van Remortel, R. D. Heuer, A. Asmone, Xavier Janssen, I. Morozov, J. Garvey, F. Cassol-Brunner, L. Hajduk, C. Werner, J. Scheins, G. G. Winter, D. Lüke, E. Barrelet, Leif J. Jönsson, Benoit Roland, F. Eisele, Z. Rurikova, E. Gabathuler, L. Bystritskaya, S. Mikocki, G. Thompson, E. Wünsch, D.P. Brown, M. Urban, J. Haller, H. Zohrabyan, R. Oganezov, A. M. Fomenko, V. Chekelian, K. Sedlák, Dave Sankey, T. Klimkovich, W.D. Dau, J. B. Dainton, K. Rybicki, A. Schöning, Judith Katzy, E. A. De Wolf, Ch. Berger, John A Coughlan, C. Gerlich, Karlheinz Meier, R. Roosen, M.-O. Boenig, A. Makankine, Laurent Favart, L. N. Shtarkov, Christoph Grab, J. Wagner, V. Nagovizin, K. Daum, G. Buschhorn, B. Leißner, M. Peez, Y.H. Fleming, T. Anthonis, F. Tomasz, B. Stella, G. D. Patel, J. Kroseberg, S. Mangano, D.P. Johnson, D. Ozerov, J. Böhme, H. Henschel, J.C. Bizot, Karel Cerny, C. Duprel, G. Knies, A. Uraev, N. Malden, F. Zomer, M. Beckingham, R. Weber, Nicolas Berger, Matthias Ulrich Mozer, A. Lebedev, Gero Flucke, V. Andreev, C. Risler, A. Fedotov, Günter Flügge, D. Haidt, L. Lytkin, Cristinel Diaconu, Georgios Tsipolitis, M. Fleischer, M. Kapichine, M. Nozicka, I. Herynek, C. Kiesling, Dusan Bruncko, Eram Rizvi, G. Heinzelmann, A. De Roeck, V. Dodonov, Martin Erdmann, E. Tzamariudaki, A. J. Campbell, S. Michine, J. Formánek, C. Gwilliam, A. Rostovtsev, B. Naroska, J-P. Meyer, B. Delcourt, Yves Sirois, J. Cvach, Bogdan Povh, F. Sefkow, G. Ossoskov, Rainer Stamen, T. Kluge, T. Greenshaw, Erika Garutti, M. Ismail, David Milstead, P. A. Smirnov, P. Baranov, G. Franke, Wolfram Erdmann, B. List, Peter Schleper, S. Schätzel, J. Ferencei, M. Martisikova, J. Naumann, C. Pascaud, J. Marks, Guenter Eckerlin, A. Nikiforov, A. Dubak, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Claus Kleinwort, Sergey Rusakov, P. Truöl, D. Utkin, B. Reisert, J. Bähr, S. Ghazaryan, Y. Vazdik, P.D. Thompson, M. Schneider, S. Caron, Stefania Xella, D.K. Nikitin, B. Wessling, R. Pöschl, O. Henshaw, R. Marshall, K. Müller, Christian Schwanenberger, Stephen Maxfield, M. Hildebrandt, J. Stiewe, Andrew Mehta, J. Bracinik, N. Gogitidze, Anton Babaev, J. G. Contreras, A. Mohamed, M. Wessels, M. Ellerbrock, G. Herrera, Bradley Cox, R. Wolf, Klaus Desch, A. Rimmer, A. Knutsson, Zhen Zhang, Ricardo Lopez-Fernandez, D. Hoffmann, Andreas Meyer, D. Meer, A. Usik, G. Frising, J. E. Olsson, W. Bartel, F. W. Büsser, T. Berndt, Natasa Raicevic, Vincent Boudry, A. N. Morozov, M. Gregori, L. Lindfeld, G. Weber, U. Straumann, V. Jemanov, V. Yeganov, A. Aktas, Y. R. Coppens, F. Moreau, B. Olivier, D. Kant, Katerina Lipka, K. H. Hiller, R. C. W. Henderson, V. Tchoulakov, I. Strauch, Philipp Fleischmann, A. Vest, O. Behrendt, S. Vinokurova, Peter Robmann, R. Lemrani, P. Kostka, J. Turnau, A. Specka, S. Backovic, H. Lueders, Wolfgang Lange, J. Gayler, C. Veelken, Paul Laycock, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, J. Dingfelder, N. Werner, T. Kuhr, Roland Horisberger, A. Valkárová, and Martin Karlsson

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Photon, Proton, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, Detector, Structure function, Compton scattering, HERA, 01 natural sciences, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics
Abstract

The proton structure function F-2(x, Q(2)) is measured in inelastic QED Compton scattering using data collected with the H1 detector at HERA. QED Compton events are used to access the kinematic range of very low virtualities of the exchanged photon, Q(2), down to 0.5 GeV2, and Bjorken x up to similar to 0.06, a region which has not been covered previously by inclusive measurements at HERA. The results are in agreement with the measurements from fixed target lepton-nucleon scattering experiments. (C) 2004 Published by Elsevier B.V.

Published
2004

4. Muon pair production in ep collisions at HERA

Author

Wolfgang Lange, Laurent Schoeffel, J. Gayler, Paul Laycock, E. Malinovski, Emmanuel Sauvan, J. C. Bizot, Murrough Landon, Max Klein, C. Niebuhr, G. Grindhammer, N. Keller, J. Dingfelder, S. Egli, Y. Soloviev, V. Lendermann, V. Schröder, P. D. Thompson, S. Levonian, A. B. Meyer, K. Meier, Dusan Bruncko, S. Mangano, F. Eisele, H. U. Martyn, K. Sedlák, N. Werner, M. Ismail, David Milstead, S. Gorbounov, Y.R. Coppens, B. Naroska, J. B. Dainton, F. Moreau, J. Hladký, V. Korbel, Wolfram Erdmann, T. Kluge, J. E. Olsson, T. Greenshaw, J. G. Contreras, Pierre Marage, T. Kuhr, P. A. Smirnov, F. P. Schilling, A. Makankine, G. Buschhorn, D. Ozerov, R. Weber, J. V. Morris, S. D. Kolya, P. Van Mechelen, S. Michine, A. Bunyatyan, F. W. Büsser, J. Žáček, J. Haller, D. Kant, Stephen Maxfield, J. Ferencei, M. Martisikova, C. Veelken, R. D. Heuer, I. Morozov, L. Bystritskaya, M.-O. Boenig, P. Murín, J. Garvey, J. Scheins, C. Johnson, H. Zohrabyan, Hans-Christian Schultz-Coulon, J. Stiewe, A. Vichnevski, I. R. Kenyon, T. Berndt, C. Risler, A. M. Fomenko, J. D. Dowell, D.P. Brown, S. Ghazaryan, Alexandre Lebedev, W.D. Dau, B. Leißner, Natasa Raicevic, Vincent Boudry, K. Rybicki, Christoph Grab, D. Meer, J. Marks, Andrew Mehta, J. Bracinik, Claus Kleinwort, V. Lubimov, I. Sheviakov, S. Schmitt, C. Werner, D. Haidt, F. Tomasz, C. Gerlich, G. Thompson, O. Behnke, Martin Erdmann, S. Lüders, A. N. Morozov, Nicolas Berger, C. Berger, J. Formánek, M. Gregori, N. Gogitidze, W. Bartel, R. Eichler, G. Knies, S. Caron, T. J. Sloan, A. J. Campbell, B. E. Cox, K. H. Hiller, R. C. W. Henderson, Eram Rizvi, R. Pöschl, A. Rostovtsev, I. Strauch, Philipp Fleischmann, Peter Robmann, M. Winde, P. Baranov, M. Hildebrandt, Roland Horisberger, G. Heinzelmann, V. Dodonov, Daniel Pitzl, D. Traynor, M. Jacquet, A. Asmone, H. Grässler, M. Ibbotson, V. Spaskov, J. Kroseberg, Judith Katzy, H. Henschel, A. Valkárová, L. N. Shtarkov, F. Cassol-Brunner, K. Gabathuler, D.K. Nikitin, O. Henshaw, Paul Newman, D. Wegener, V. Grabski, W. Braunschweig, F. Zomer, J. Kückens, Y.H. Fleming, H. Spitzer, Rainer Stamen, L. Hajduk, C. Wissing, Laurent Favart, T. Anthonis, M. Wessels, D. South, E. Wünsch, C. Duprel, M. Urban, Adrian Perieanu, Dave Sankey, N. Delerue, M. Ellerbrock, V. Andreev, A. Specka, Thorsten Lux, L. Janauschek, Martin Karlsson, Gero Flucke, R. Marshall, B. Reisert, J. Bähr, G. Herrera, B. Waugh, G. Weber, M. C. Cousinou, U. Straumann, M. Kapichine, M. Nozicka, G. D. Patel, V. Jemanov, S. Backovic, B. Wessling, Thomas Naumann, V. Efremenko, B. Koblitz, V. Chekelian, D.P. Johnson, V. Nagovizin, N. Malden, Georgios Tsipolitis, H. Lueders, V. Volchinski, A. Vest, O. Behrendt, E. E. Woehrling, S. Vinokurova, M. Fleischer, S. Mikocki, J. Wagner, Yves Sirois, R. Lemrani, H. Meyer, Klaus Desch, J. Böhme, R. Demirchyan, P. Kostka, Karel Cerny, A. Uraev, G. Franke, J. Turnau, L. Lytkin, Cristinel Diaconu, B. List, A. Knutsson, A. Babaev, A. Aktas, S. Schätzel, Bogdan Povh, B. Olivier, Xavier Janssen, F. Sefkow, G. Ossoskov, I. Milcewicz, Leif J. Jönsson, K. Müller, Christian Schwanenberger, Grzegorz Nowak, R. Koutouev, A. Petrukhin, Zhen Zhang, J-P. Meyer, Ricardo Lopez-Fernandez, I. Foresti, S. Baumgartner, G. Cozzika, C. Pascaud, D. Hoffmann, Guenter Eckerlin, André Schöning, A. Usik, Stefan Valkar, G. Frising, J. Cvach, A. Belousov, Peter Schleper, H.-B. Bröker, Hannes Jung, J. Kennedy, Alexander Zhokin, J. Becker, C. Vallée, P.J.W. Faulkner, V. Brisson, R. Heremans, S. Vassiliev, Sergey Rusakov, P. Truöl, W. Yan, C. Collard, T. Laštovička, N. Loktionova, J. Gassner, A. Hovhannisyan, E. Barrelet, Z. Rurikova, I. Tsurin, B. Portheault, E. A. De Wolf, J. Zalesak, E. E. Elsen, J. Martyniak, R. Roosen, J. A. Coughlan, I. Herynek, B. Delcourt, B. Stella, K. Daum, J. Rauschenberger, A. D.R. Vargas Trevino, E. Perez, R. Gerhards, P. E. Reimer, G. G. Winter, J. Naumann, L. Goerlich, P. Höting, S. Schmidt, Ewelina Lobodzinska, Anna Kropivnitskaya, R. Felst, M. Beckingham, Matthias Ulrich Mozer, A. Fedotov, Günter Flügge, C. Kiesling, A. De Roeck, E. Tzamariudaki, E. Gabathuler, K. Wacker, A. Dubak, Y. Vazdik, D. Lüke, M. Schneider, M. Peez, H1 Collaboration, 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 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), 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), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Damoiseaux, Magali

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Muon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, FOS: Physical sciences, HERA, Electron, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pair production, Full data, 0103 physical sciences, Transverse momentum, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract

Cross sections for the production of two isolated muons up to high di-muon masses are measured in ep collisions at HERA with the H1 detector in a data sample corresponding to an integrated luminosity of 71 pb-1 at a centre of mass energy of √s=319 GeV. The results are in good agreement with Standard Model predictions, the dominant process being photon-photon interactions. Additional muons or electrons are searched for in events with two high transverse momentum muons using the full data sample corresponding to 114 pb-1, where data at √s=301 GeV and √s=319 GeV are combined. Both the di-lepton sample and the tri-lepton sample agree well with the predictions. © 2004 Published by Elsevier B.V., 0, DESY-03-159 / hep-ex/0311015, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2004

5. Search for new physics in e±q contact interactions at HERA

Author

V. Jemanov, C. Niebuhr, Laurent Schoeffel, Murrough Landon, Paul Richard Newman, Grzegorz Nowak, N. Loktionova, J. Gassner, A. Hovhannisyan, J.G. Contreras, I. Tsurin, M. C. Cousinou, J.E. Turney, P. Baranov, Peter Schleper, S. Egli, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, R. Koutouev, A. Petrukhin, S. Mangano, D. Lüke, C. Wissing, J. Zalesak, Y. Soloviev, E. Wünsch, P. Höting, L. Janauschek, I. Potachnikova, J. Martyniak, S. Lüders, G. Buschhorn, D. Ozerov, V. Lubimov, Dusan Bruncko, B. Naroska, K. H. Hiller, T. Kluge, T. Greenshaw, Rainer Wallny, A. Astvatsatourov, Paul Laycock, E. Malinovski, F. P. Schilling, Doris Eckstein, P. Van Mechelen, R. C. W. Henderson, E. Eisenhandler, R. Pöschl, J. Cvach, G. Grindhammer, G. D. Patel, D.P. Johnson, J. Ferencei, J. Naumann, J. Marks, J. Formánek, J. Dingfelder, N. Werner, D. Clarke, B. Waugh, Claus Kleinwort, S. Baumgartner, N. Malden, Wolfram Erdmann, B. List, M. zur Nedden, Pierre Marage, John A Coughlan, I. Sheviakov, J. Rauschenberger, G. Weber, U. Straumann, D. Kant, David Schmidt, K. Sedlák, O. Karschnick, K. Gabathuler, K. Rybicki, D. Wegener, W.J. Haynes, S. Schmidt, J. V. Morris, C. Risler, K. Daum, S. Mohrdieck, D. P. C. Sankey, A. Specka, Caroline Collard, Christoph Grab, J. Kennedy, V. Brisson, S. Vassiliev, J. Wagner, A. D.R. Vargas Trevino, C. Adloff, F. Keil, H. Meyer, R. Demirchyan, M.N. Mondragon, A. Bunyatyan, Leif J. Jönsson, V. Efremenko, B. Koblitz, Markus Wobisch, Xavier Janssen, J. Böhme, Stephen Maxfield, L. N. Shtarkov, F. Tomasz, V. Spaskov, R. Maraček, R. Marshall, Ewelina Lobodzinska, A. Beglarian, Pavel Murin, H. Grässler, K. Wacker, J. Stiewe, O. Behnke, S. Mikocki, A. Uraev, G. Knies, J-P. Meyer, Martin Erdmann, J. Žáček, M. Ibbotson, A. Knutsson, T. Schörner-Sadenius, T. Laštovička, R. Felst, Matthew Jones, B. Stella, F. Niebergall, Stefan Schmitt, Andrew Mehta, E. Barrelet, P. Dixon, Hans-Christian Schultz-Coulon, Glenn J. White, M. Hildebrandt, A. Vichnevski, A. Lebedev, F. Sefkow, V. Chekelian, V. Korbel, P. Kjellberg, F. Moreau, J. Hladký, J. D. Dowell, B. Lobodzinski, A. Vest, A. Rostovtsev, N. Gogitidze, V. Nagovizin, A. Droutskoi, D. Haidt, E. Perez, S. Caron, V. Panassik, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, S. Hengstmann, Judith Katzy, S. Hurling, Eram Rizvi, G. Heinzelmann, R. Eichler, R. Gerhards, M. Winde, S. D. Kolya, V. Dodonov, L. Lytkin, E.-E. Woehrling, C. Werner, Laurent Favart, T. Anthonis, Cristinel Diaconu, Ç. İşsever, T. Wilksen, P. E. Reimer, C. Johnson, F. Zomer, C. Duprel, I. Herynek, Daniel Pitzl, V. Andreev, L. Bystritskaya, R. Lemrani, P. Kostka, J. Turnau, T. Kuhr, B. Reisert, J. Bähr, S. Levonian, I. R. Kenyon, G. G. Winter, D. Traynor, H. U. Martyn, O. Nix, F. Cassol-Brunner, S. K. Kotelnikov, L. Hajduk, D. South, M. Wessels, M. Urban, H. Spitzer, D.P. Brown, J. Haller, Yves Sirois, M. Ellerbrock, G. Thompson, B. Andrieu, S. Ghazaryan, M. Davidsson, Bradley Cox, G. Franke, Katja Krüger, L. Goerlich, S. Michine, Roland Horisberger, A. Valkárová, H. Henschel, J.C. Bizot, N. Delerue, K. Müller, Christian Schwanenberger, Anton Babaev, I. Foresti, G. Cozzika, F. Eisele, J.P. Phillips, Stefan Valkar, H.-B. Bröker, Martin Karlsson, Hannes Jung, D. Lamb, Alexander Zhokin, J. Becker, C. Vallée, R. Heremans, M. Kapichine, M. Nozicka, A. Koutov, B. Delcourt, S. Schätzel, N. Keller, V. Lendermann, V. Schröder, Eckhard Elsen, Wolfgang Lange, J. Gayler, R. Stamen, Peter Robmann, J. Scheins, W.D. Dau, J. B. Dainton, B. Leißner, A. Loginov, M. Jacquet, Zhen Zhang, T. Hadig, G. Herrera, V. Grabski, D. Hoffmann, Andreas Meyer, D. Meer, A. Usik, G. Frising, Y. R. Coppens, Max Klein, I. Strauch, Philipp Fleischmann, Beate Heinemann, David Milstead, C. Pascaud, P. A. Smirnov, Guenter Eckerlin, S. Ferron, S. Wiesand, Th. Naumann, M. Jaffre, J. E. Olsson, W. Bartel, M. Hilgers, J. Garvey, F. W. Büsser, W. Braunschweig, A. M. Fomenko, E. Lebailly, C. Gerlich, T. Berndt, A. Burrage, E. Gabathuler, J. Kroseberg, Vincent Boudry, Y. H. Fleming, A. N. Morozov, Georgios Tsipolitis, M. Fleischer, A. Schöning, Bogdan Povh, A. Dubak, Y. Vazdik, P.D. Thompson, S. Tchetchelnitski, M. Schneider, M. Peez, M. Beckingham, A. Fedotov, Günter Flügge, C. Kiesling, A.C. Wyatt, A. De Roeck, E. Tzamariudaki, A. J. Campbell, and H1 Collaboration

Subjects
Quark, Physics, Nuclear and High Energy Physics, Particle physics, Neutral current, Physics beyond the Standard Model, High Energy Physics::Phenomenology, Momentum transfer, FOS: Physical sciences, HERA, Supersymmetry, High Energy Physics - Experiment, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), Large extra dimension, High Energy Physics::Experiment
Abstract

Deep-inelastic e^\pm p scattering at high squared momentum transfer Q^2 up to 30000 GeV^2 is used to search for eq contact interactions associated to scales far beyond the HERA centre of mass energy. The neutral current cross section measurements d sigma / d Q^2, corresponding to integrated luminosities of 16.4 pb^-1 of e^- p data and 100.8 pb^-1 of e^+ p data, are well described by the Standard Model and are analysed to set constraints on new phenomena. For conventional contact interactions lower limits are set on compositeness scales Lambda ranging between 1.6 - 5.5 TeV. Couplings and masses of leptoquarks and squarks in R-parity violating supersymmetry are constrained to M / lambda > 0.3 - 1.4 TeV. A search for low scale quantum gravity effects in models with large extra dimensions provides limits on the effective Planck scale of M_S > 0.8 TeV. A form factor analysis yields a bound on the radius of light quarks of R_q < 1.0 x 10^-18 m., 15 pages, 5 figures and 5 tables

Published
2003

6. Elastic photoproduction of J/ψ and ϒ mesons at HERA

Author

C. Adloff, V. Andreev, B. Andrieu, V. Arkadov, A. Astvatsatourov, I. Ayyaz, A. Babaev, J. Bähr, P. Baranov, E. Barrelet, W. Bartel, U. Bassler, P. Bate, A. Beglarian, O. Behnke, C. Beier, A. Belousov, T. Benisch, Ch. Berger, G. Bernardi, T. Berndt, J.C. Bizot, K. Borras, V. Boudry, W. Braunschweig, V. Brisson, H.-B. Bröker, D.P. Brown, W. Brückner, P. Bruel, D. Bruncko, J. Bürger, F.W. Büsser, A. Bunyatyan, H. Burkhardt, A. Burrage, G. Buschhorn, A.J. Campbell, J. Cao, T. Carli, S. Caron, E. Chabert, D. Clarke, B. Clerbaux, C. Collard, J.G. Contreras, J.A. Coughlan, M.-C. Cousinou, B.E. Cox, G. Cozzika, J. Cvach, J.B. Dainton, W.D. Dau, K. Daum, M. David, M. Davidsson, B. Delcourt, N. Delerue, R. Demirchyan, A. De Roeck, E.A. De Wolf, C. Diaconu, P. Dixon, V. Dodonov, J.D. Dowell, A. Droutskoi, C. Duprel, G. Eckerlin, D. Eckstein, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, M. Ellerbrock, E. Elsen, M. Erdmann, W. Erdmann, P.J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Ferencei, S. Ferron, M. Fleischer, G. Flügge, A. Fomenko, I. Foresti, J. Formánek, J.M. Foster, G. Franke, E. Gabathuler, K. Gabathuler, J. Garvey, J. Gassner, J. Gayler, R. Gerhards, S. Ghazaryan, L. Goerlich, N. Gogitidze, M. Goldberg, C. Goodwin, C. Grab, H. Grässler, T. Greenshaw, G. Grindhammer, T. Hadig, D. Haidt, L. Hajduk, T. Hauschildt, W.J. Haynes, B. Heinemann, G. Heinzelmann, R.C.W. Henderson, S. Hengstmann, H. Henschel, R. Heremans, G. Herrera, I. Herynek, M. Hilgers, K.H. Hiller, C.D. Hilton, J. Hladký, P. Höting, D. Hoffmann, W. Hoprich, R. Horisberger, S. Hurling, M. Ibbotson, Ç. İşsever, M. Jacquet, M. Jaffre, L. Janauschek, D.M. Jansen, X. Janssen, V. Jemanov, L. Jönsson, D.P. Johnson, M.A.S. Jones, H. Jung, H.K. Kästli, D. Kant, M. Kapichine, M. Karlsson, O. Karschnick, O. Kaufmann, M. Kausch, F. Keil, N. Keller, J. Kennedy, I.R. Kenyon, S. Kermiche, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, B. Koblitz, H. Kolanoski, S.D. Kolya, V. Korbel, P. Kostka, S.K. Kotelnikov, M.W. Krasny, H. Krehbiel, J. Kroseberg, D. Krücker, K. Krüger, A. Küpper, T. Kuhr, T. Kurča, R. Kutuev, W. Lachnit, R. Lahmann, D. Lamb, M.P.J. Landon, W. Lange, T. Laštovička, A. Lebedev, B. Leißner, R. Lemrani, V. Lendermann, S. Levonian, M. Lindstroem, B. List, E. Lobodzinska, B. Lobodzinski, N. Loktionova, V. Lubimov, S. Lüders, D. Lüke, L. Lytkin, N. Magnussen, H. Mahlke-Krüger, N. Malden, E. Malinovski, I. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, H.-U. Martyn, J. Martyniak, S.J. Maxfield, A. Mehta, K. Meier, P. Merkel, F. Metlica, A. Meyer, H. Meyer, J. Meyer, P.-O. Meyer, S. Mikocki, D. Milstead, T. Mkrtchyan, R. Mohr, S. Mohrdieck, M.N. Mondragon, F. Moreau, A. Morozov, J.V. Morris, D. Müller, K. Müller, P. Murı́n, V. Nagovizin, B. Naroska, J. Naumann, Th. Naumann, I. Négri, G. Nellen, P.R. Newman, T.C. Nicholls, F. Niebergall, C. Niebuhr, O. Nix, G. Nowak, T. Nunnemann, J.E. Olsson, D. Ozerov, V. Panassik, C. Pascaud, G.D. Patel, E. Perez, J.P. Phillips, D. Pitzl, R. Pöschl, I. Potachnikova, B. Povh, K. Rabbertz, G. Rädel, J. Rauschenberger, P. Reimer, B. Reisert, D. Reyna, S. Riess, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, C. Royon, S. Rusakov, K. Rybicki, D.P.C. Sankey, J. Scheins, F.-P. Schilling, S. Schleif, P. Schleper, D. Schmidt, L. Schoeffel, A. Schöning, T. Schörner, V. Schröder, H.-C. Schultz-Coulon, K. Sedlák, F. Sefkow, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, G. Siegmon, P. Sievers, Y. Sirois, T. Sloan, P. Smirnov, V. Solochenko, Y. Soloviev, V. Spaskov, A. Specka, H. Spitzer, R. Stamen, J. Steinhart, B. Stella, A. Stellberger, J. Stiewe, U. Straumann, W. Struczinski, M. Swart, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, G. Thompson, P.D. Thompson, N. Tobien, D. Traynor, P. Truöl, G. Tsipolitis, J. Turnau, J.E. Turney, E. Tzamariudaki, S. Udluft, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Mechelen, Y. Vazdik, S. von Dombrowski, K. Wacker, R. Wallny, T. Walter, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, T. Wengler, M. Werner, G. White, S. Wiesand, T. Wilksen, M. Winde, G.-G. Winter, C. Wissing, M. Wobisch, H. Wollatz, E. Wünsch, A.C. Wyatt, J. Žáček, J. Zálešák, Z. Zhang, A. Zhokin, F. Zomer, J. Zsembery, and M. zur Nedden

Subjects
Physics, Scattering cross-section, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Meson, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Perturbative QCD, Sigma, HERA, Regge theory, Pomeron, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Cross sections for elastic photoproduction of J/Psi and Upsilon mesons are presented. For J/Psi mesons the dependence on the photon-proton centre-of-mass energy W_gammap is analysed in an extended range with respect to previous measurements of 26

Published
2000

7. Search for excited electrons at HERA

Author

C. Adloff, V. Andreev, B. Andrieu, T. Anthonis, A. Astvatsatourov, A. Babaev, J. Bähr, P. Baranov, E. Barrelet, W. Bartel, S. Baumgartner, J. Becker, M. Beckingham, A. Beglarian, O. Behnke, A. Belousov, Ch. Berger, T. Berndt, J.C. Bizot, J. Böhme, V. Boudry, W. Braunschweig, V. Brisson, H.-B. Bröker, D.P. Brown, D. Bruncko, F.W. Büsser, A. Bunyatyan, A. Burrage, G. Buschhorn, L. Bystritskaya, A.J. Campbell, S. Caron, F. Cassol-Brunner, D. Clarke, C. Collard, J.G. Contreras, Y.R. Coppens, J.A. Coughlan, M.-C. Cousinou, B.E. Cox, G. Cozzika, J. Cvach, J.B. Dainton, W.D. Dau, K. Daum, M. Davidsson, B. Delcourt, N. Delerue, R. Demirchyan, A. De Roeck, E.A. De Wolf, C. Diaconu, J. Dingfelder, P. Dixon, V. Dodonov, J.D. Dowell, A. Droutskoi, A. Dubak, C. Duprel, G. Eckerlin, D. Eckstein, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, M. Ellerbrock, E. Elsen, M. Erdmann, W. Erdmann, P.J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Ferencei, S. Ferron, M. Fleischer, P. Fleischmann, Y.H. Fleming, G. Flügge, A. Fomenko, I. Foresti, J. Formánek, G. Franke, G. Frising, E. Gabathuler, K. Gabathuler, J. Garvey, J. Gassner, J. Gayler, R. Gerhards, C. Gerlich, S. Ghazaryan, L. Goerlich, N. Gogitidze, C. Grab, V. Grabski, H. Grässler, T. Greenshaw, G. Grindhammer, T. Hadig, D. Haidt, L. Hajduk, J. Haller, B. Heinemann, G. Heinzelmann, R.C.W. Henderson, S. Hengstmann, H. Henschel, R. Heremans, G. Herrera, I. Herynek, M. Hildebrandt, M. Hilgers, K.H. Hiller, J. Hladký, P. Höting, D. Hoffmann, R. Horisberger, A. Hovhannisyan, S. Hurling, M. Ibbotson, Ç. İşsever, M. Jacquet, M. Jaffre, L. Janauschek, X. Janssen, V. Jemanov, L. Jönsson, C. Johnson, D.P. Johnson, M.A.S. Jones, H. Jung, D. Kant, M. Kapichine, M. Karlsson, O. Karschnick, J. Katzy, F. Keil, N. Keller, J. Kennedy, I.R. Kenyon, C. Kiesling, P. Kjellberg, M. Klein, C. Kleinwort, T. Kluge, G. Knies, B. Koblitz, S.D. Kolya, V. Korbel, P. Kostka, S.K. Kotelnikov, R. Koutouev, A. Koutov, J. Kroseberg, K. Krüger, T. Kuhr, D. Lamb, M.P.J. Landon, W. Lange, T. Laštovička, P. Laycock, E. Lebailly, A. Lebedev, B. Leißner, R. Lemrani, V. Lendermann, S. Levonian, B. List, E. Lobodzinska, B. Lobodzinski, A. Loginov, N. Loktionova, V. Lubimov, S. Lüders, D. Lüke, L. Lytkin, N. Malden, E. Malinovski, S. Mangano, R. Maraček, P. Marage, J. Marks, R. Marshall, H.-U. Martyn, J. Martyniak, S.J. Maxfield, D. Meer, A. Mehta, K. Meier, A.B. Meyer, H. Meyer, J. Meyer, S. Michine, S. Mikocki, D. Milstead, S. Mohrdieck, M.N. Mondragon, F. Moreau, A. Morozov, J.V. Morris, K. Müller, P. Murı́n, V. Nagovizin, B. Naroska, J. Naumann, Th. Naumann, P.R. Newman, F. Niebergall, C. Niebuhr, O. Nix, G. Nowak, M. Nozicka, B. Olivier, J.E. Olsson, D. Ozerov, V. Panassik, C. Pascaud, G.D. Patel, M. Peez, E. Perez, A. Petrukhin, J.P. Phillips, D. Pitzl, R. Pöschl, I. Potachnikova, B. Povh, J. Rauschenberger, P. Reimer, B. Reisert, C. Risler, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, S. Rusakov, K. Rybicki, D.P.C. Sankey, S. Schätzel, J. Scheins, F.-P. Schilling, P. Schleper, D. Schmidt, S. Schmidt, S. Schmitt, M. Schneider, L. Schoeffel, A. Schöning, T. Schörner, V. Schröder, H.-C. Schultz-Coulon, C. Schwanenberger, K. Sedlák, F. Sefkow, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, Y. Sirois, T. Sloan, P. Smirnov, Y. Soloviev, D. South, V. Spaskov, A. Specka, H. Spitzer, R. Stamen, B. Stella, J. Stiewe, I. Strauch, U. Straumann, S. Tchetchelnitski, G. Thompson, P.D. Thompson, F. Tomasz, D. Traynor, P. Truöl, G. Tsipolitis, I. Tsurin, J. Turnau, J.E. Turney, E. Tzamariudaki, A. Uraev, M. Urban, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Mechelen, A. Vargas Trevino, S. Vassiliev, Y. Vazdik, C. Veelken, A. Vest, A. Vichnevski, K. Wacker, J. Wagner, R. Wallny, B. Waugh, G. Weber, D. Wegener, C. Werner, N. Werner, M. Wessels, G. White, S. Wiesand, T. Wilksen, M. Winde, G.-G. Winter, Ch. Wissing, M. Wobisch, E.-E. Woehrling, E. Wünsch, A.C. Wyatt, J. Žáček, J. Zálešák, Z. Zhang, A. Zhokin, F. Zomer, M. zur Nedden, 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, H1 Collaboration, 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, Particle physics, Nuclear and High Energy Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Detector, Electroweak interaction, FOS: Physical sciences, HERA, Lambda, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Excited state, 0103 physical sciences, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics
Abstract

A search for excited electron (e*) production is described in which the electroweak decays e* → eγ, e* → eZ and e* → v W are considered. The data used correspond to an integrated luminosity of 120 pb -1 taken in e ±p collisions from 1994 to 2000 with the H1 detector at HERA at centre-of-mass energies of 300 and 318 GeV. No evidence for a signal is found. Mass dependent exclusion limits are derived for the ratio of the couplings to the compositeness scale, f/Λ. These limits extend the excluded region to higher masses than has been possible in previous direct searches for excited electrons. © 2002 Published by Elsevier Science B.V., 0, DESY-02-096 /hep-ex/0207038, H1 Collaboration., info:eu-repo/semantics/published

Published
2002

8. Measurement of D∗± meson production and F2c in deep-inelastic scattering at HERA

Author

C. Adloff, V. Andreev, B. Andrieu, T. Anthonis, V. Arkadov, A. Astvatsatourov, A. Babaev, J. Bähr, P. Baranov, E. Barrelet, W. Bartel, P. Bate, A. Beglarian, O. Behnke, C. Beier, A. Belousov, T. Benisch, Ch. Berger, T. Berndt, J.C. Bizot, V. Boudry, W. Braunschweig, V. Brisson, H.-B. Bröker, D.P. Brown, W. Brückner, D. Bruncko, J. Bürger, F.W. Büsser, A. Bunyatyan, A. Burrage, G. Buschhorn, A.J. Campbell, J. Cao, T. Carli, S. Caron, D. Clarke, B. Clerbaux, C. Collard, J.G. Contreras, Y.R. Coppens, J.A. Coughlan, M.-C. Cousinou, B.E. Cox, G. Cozzika, J. Cvach, J.B. Dainton, W.D. Dau, K. Daum, M. Davidsson, B. Delcourt, N. Delerue, R. Demirchyan, A. De Roeck, E.A. De Wolf, C. Diaconu, J. Dingfelder, P. Dixon, V. Dodonov, J.D. Dowell, A. Droutskoi, A. Dubak, C. Duprel, G. Eckerlin, D. Eckstein, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, M. Ellerbrock, E. Elsen, M. Erdmann, W. Erdmann, P.J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Ferencei, S. Ferron, M. Fleischer, Y.H. Fleming, G. Flügge, A. Fomenko, I. Foresti, J. Formánek, J.M. Foster, G. Franke, E. Gabathuler, K. Gabathuler, J. Garvey, J. Gassner, J. Gayler, R. Gerhards, C. Gerlich, S. Ghazaryan, L. Goerlich, N. Gogitidze, M. Goldberg, C. Goodwin, C. Grab, H. Grässler, T. Greenshaw, G. Grindhammer, T. Hadig, D. Haidt, L. Hajduk, W.J. Haynes, B. Heinemann, G. Heinzelmann, R.C.W. Henderson, S. Hengstmann, H. Henschel, R. Heremans, G. Herrera, I. Herynek, M. Hildebrandt, M. Hilgers, K.H. Hiller, J. Hladký, P. Höting, D. Hoffmann, R. Horisberger, S. Hurling, M. Ibbotson, Ç. İşsever, M. Jacquet, M. Jaffre, L. Janauschek, D.M. Jansen, X. Janssen, V. Jemanov, L. Jönsson, D.P. Johnson, M.A.S. Jones, H. Jung, H.K. Kästli, D. Kant, M. Kapichine, M. Karlsson, O. Karschnick, F. Keil, N. Keller, J. Kennedy, I.R. Kenyon, S. Kermiche, C. Kiesling, P. Kjellberg, M. Klein, C. Kleinwort, T. Kluge, G. Knies, B. Koblitz, S.D. Kolya, V. Korbel, P. Kostka, S.K. Kotelnikov, R. Koutouev, A. Koutov, H. Krehbiel, J. Kroseberg, K. Krüger, A. Küpper, T. Kuhr, T. Kurča, R. Lahmann, D. Lamb, M.P.J. Landon, W. Lange, T. Laštovička, P. Laycock, E. Lebailly, A. Lebedev, B. Leißner, R. Lemrani, V. Lendermann, S. Levonian, M. Lindstroem, B. List, E. Lobodzinska, B. Lobodzinski, A. Loginov, N. Loktionova, V. Lubimov, S. Lüders, D. Lüke, L. Lytkin, H. Mahlke-Krüger, N. Malden, E. Malinovski, I. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, H.-U. Martyn, J. Martyniak, S.J. Maxfield, D. Meer, A. Mehta, K. Meier, P. Merkel, A.B. Meyer, H. Meyer, J. Meyer, P.-O. Meyer, S. Mikocki, D. Milstead, T. Mkrtchyan, R. Mohr, S. Mohrdieck, M.N. Mondragon, F. Moreau, A. Morozov, J.V. Morris, K. Müller, P. Murı́n, V. Nagovizin, B. Naroska, J. Naumann, Th. Naumann, G. Nellen, P.R. Newman, T.C. Nicholls, F. Niebergall, C. Niebuhr, O. Nix, G. Nowak, J.E. Olsson, D. Ozerov, V. Panassik, C. Pascaud, G.D. Patel, M. Peez, E. Perez, J.P. Phillips, D. Pitzl, R. Pöschl, I. Potachnikova, B. Povh, K. Rabbertz, G. Rädel, J. Rauschenberger, P. Reimer, B. Reisert, D. Reyna, C. Risler, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, S. Rusakov, K. Rybicki, D.P.C. Sankey, J. Scheins, F.-P. Schilling, P. Schleper, D. Schmidt, S. Schmitt, M. Schneider, L. Schoeffel, A. Schöning, T. Schörner, V. Schröder, H.-C. Schultz-Coulon, C. Schwanenberger, K. Sedlák, F. Sefkow, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, Y. Sirois, T. Sloan, P. Smirnov, V. Solochenko, Y. Soloviev, D. South, V. Spaskov, A. Specka, H. Spitzer, R. Stamen, B. Stella, J. Stiewe, U. Straumann, M. Swart, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, G. Thompson, P.D. Thompson, N. Tobien, D. Traynor, P. Truöl, G. Tsipolitis, I. Tsurin, J. Turnau, J.E. Turney, E. Tzamariudaki, S. Udluft, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Mechelen, S. Vassiliev, Y. Vazdik, A. Vichnevski, K. Wacker, R. Wallny, B. Waugh, G. Weber, M. Weber, D. Wegener, C. Werner, M. Werner, N. Werner, G. White, S. Wiesand, T. Wilksen, M. Winde, G.-G. Winter, Ch. Wissing, M. Wobisch, E. Wünsch, A.C. Wyatt, J. Žáček, J. Zálešák, Z. Zhang, A. Zhokin, F. Zomer, J. Zsembery, M. zur Nedden, and H1 Collaboration

Subjects
Physics, Particle physics, Nuclear and High Energy Physics, Proton, Meson, Scattering, High Energy Physics::Phenomenology, Perturbative QCD, FOS: Physical sciences, HERA, Deep inelastic scattering, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), D meson, Physique des particules élémentaires, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment
Abstract

The inclusive production of D*±(2010) mesons in deep-inelastic scattering is studied with the H1 detector at HERA. In the kinematic region 1 < Q2 < 100 GeV2 and 0.05 < y < 0.7 an e+ p cross section for inclusive D*± meson production of 8.50 ± 0.42(stat.)+1.21-1.00 (syst.) nb is measured in the visible range PtD* > 1.5 GeV and ηD*< 1.5. Single and double differential inclusive D*± meson cross sections are compared to perturbative QCD calculations in two different evolution schemes. The charm contribution to the proton structure, FC2(X, Q2), is determined by extrapolating the visible charm cross section to the full phase space. This contribution is found to rise from about 10% at Q2 = 1.5 GeV2 to more than 25% at Q2 = 60 GeV2 corresponding to x values ranging from 5 × 10-5 to 3 × 10-3. © 2002 Elsevier Science B.V. All rights reserved., 0, 400 auteurs, DESY 01-100 / hep-ex/0108039, H1 Collaboration., info:eu-repo/semantics/published

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