Search

Your search keyword '"M. Symalla"' showing total 13 results
Start Over Author "M. Symalla" Language english
13 results on '"M. Symalla"'

1. J/psi production via chi(c) decays in 920 GeV pA interactions

Author

Samim Erhan, P. Kreuzer, M. Noerenberg, M. T. Nunez Pardo de Vera, R. Muresan, B. Schmidt, L. Garrido, H. B. Dreis, K. Berkhan, T. Hott, A. Stanovnik, U. Uwer, Sebastian Nowak, V. Rusinov, D. Wegener, R. Mizuk, C. Borgmeier, W. Gradl, M. Walter, D. Ryzhikov, Peter Robmann, M. Hildebrandt, S. Schmidt, B. A. Petersen, V. Saveliev, O. Gouchtchine, R. vanStaa, K. Riechmann, J. Yang, Pietro Faccioli, I. Massa, V. Aushev, J.D. Hansen, M. Spahn, C. Cruse, H. Wahlberg, D. Dujmic, J. Glaess, G. Bohm, C. Hast, Hermann Kolanoski, M. Dressel, A. Somov, G. Medin, J. Chamanina, J. Zweizig, P.E. Schlein, K. M. Danielsen, R. F. Schwitters, R. Eckmann, P. Conde, D. Kruecker, Igor Golutvin, M. Boecker, T. Jagla, S. Schaller, A. Moshkin, R. Wanke, A. Zhelezov, Yu. Zaitsev, Y. Pylypchenko, O. Steinkamp, T. Zivko, L. Sozuer, F. Sanchez, Jenny Ivarsson, M. Capponi, D. Goloubkov, K. T. Knöpfle, Kwong Lau, A. Gellrich, W. Schmidt-Parzefall, R. Spighi, Thomas Hamacher, Y. Vassiliev, I. Negri, G. Leffers, Rok Pestotnik, M. Symalla, S. J. Aplin, H. Schroeder, S. Essenov, A. Michetti, Paul Edmund Karchin, Y. Guilitsky, S. Steinbeck, S. Solunin, W. Fallot-Burghardt, U. Werthenbach, Yu.V. Mikhailov, A. Kaoukher, G.J. Wagner, B. Lewendel, David Gascon, S. F. Takach, M. Titov, T. Zeuner, A. H. Walenta, Y. Wang, J. Spengler, A. Belkov, L. Matchikhilian, O. Barsukova, S. Karabekyan, R Stdenis, U. Trunk, A. J. Schwartz, D. Stieler, Jose M Hernandez, I. Siccama, I. Abt, H. Itterbeck, Ramon Miquel, R. Baghshetsyan, D. C. Goulart, D. Galli, V. Popov, Werner Hofmann, Imma Riu, Mikhail Zavertyaev, B. Dolgoshein, V. Kochetkov, Ch. Rothe, B. Schwenninger, B. Giacobbe, S. Shuvalov, B. Bobchenko, M. Capeans, Yu. Pavlenko, Hyun-Chul Kim, A. Arefiev, S. De Castro, A. Wurz, Yu.T. Kiryushin, Laura Fabbri, L. Seybold, A. Lanyov, F. Klefenz, B. Lomonosov, V. Eiges, M. Feuerstack-Raible, C. Jiang, A. Spiridonov, V. Rybnikov, A. Golutvin, C. Padilla, W. Ruckstuhl, F. Ratnikov, I. Tikhomirov, S. Nam, Nicola Semprini-Cesari, Mauro Villa, M. Schmelling, M. A. Pleier, K. Höpfner, A. Christensen, Y. Bagaturia, Christian Bauer, D. Peralta, V. Bassetti, R. Wurth, B. Moshous, U. Schwanke, P. Truöl, C. B. Krauss, T. Oest, S. Barsuk, Samo Korpar, M. Poli, M. Adams, N. Tesch, U. Marconi, Fouzia Saadi-Lüdemann, Antonio Zoccoli, Jian Wang, M. Chmeissani, João Carvalho, Antonio Sbrizzi, J. Lüdemann, S. Spratte, E. Sexauer, D. Ressing, F. Khasanov, Robert Harr, S. Hausmann, I. Vukotic, S. Xella-Hansen, A. Bogatyrev, M. Bruinsma, U. Husemann, M. Negodaev, Kendall Reeves, T. Glebe, S. Fourletov, V. Souvorov, J. Bastos, T. Buran, I. Kisel, M. Buchler, I. Belyaev, Maurizio Piccinini, Y. Goloubkov, A. Gorisek, Dmitry Emeliyanov, T. Perschke, I. Tsakov, S. Gradl, A. Schreiner, S. Ramachandran, S. Keller, Vasco Amaral, X. Chen, F Sciacca, Klaus Dehmelt, Mogens Dam, X. Dong, R. Pernack, S. Issever, M. Sang, A. S. Schwarz, Th. S. Bauer, J. L. Rosen, A. Bertin, K. Ehret, N.N. Karpenko, D. Broemmelsiek, P. J. Weyers, R. Loke, K. E. K. Gerndt, Yunpeng Liu, Peter Buchholz, B. Schwingenheuer, A. Pose, W. Hulsbergen, Y. Jia, Z. Zheng, Marco Bruschi, A. Holscher, T. Walter, Thomas Lohse, J. Pyrlik, F. Eisele, A. Soldatov, Marcus Hohlmann, S. Somov, M. Ispiryan, J. Flammer, M. Bargiotti, B. Fominykh, Helmut Wolters, Farid Ould-Saada, M. Ouchrif, I. Arino, Wolfgang Wagner, M. Beck, Olga Igonkina, R. Zimmermann, P. Krizan, V. Balagura, H. Deckers, M. Danilov, I. Gorbounov, G. Zech, A. Mohapatra, T. Kvaratskheliia, R. Mankel, M. Funcke, I. C. Legrand, H. Albrecht, M. Starič, D. Skrk, V. Egorytchev, A. Oliveira, A. Lange, D. Pose, M. Braeuer, Mike Medinnis, C. van Eldik, Z. Ke, H. Deppe, J. Rieling, H. D. Schultz, Vincenzo Vagnoni, M. Rietz, C. Stegmann, A. Vitale, S. Semenov, António Amorim, T. Fuljahn, A. Garcia, R. Maenner, M. Mevius, H. Fleckenstein, R. Chistov, D. Samtleben, I. Belotelov, H. Kapitza, H. Thurn, Valery Pugatch, M. S. Atiya, S. Masciocchi, Z. Zhu, Geometry, (Astro)-Particles Physics, Mathematical Analysis, and Business Web and Media

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, 0103 physical sciences, Radiative transfer, High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, HERA-B
Abstract

Using data collected by the HERA-B experiment, we have measured the fraction of J\psi's produced via radiative chi_c decays in interactions of 920 GeV protons with carbon and titanium targets. We obtained R_{\chi_c} = 0.32 \pm 0.06_{stat} \pm 0.04_{sys} for the fraction of J\psi from chi_c decays averaged over proton-carbon and proton-titanium collisions. This result is in agreement with previous measurements and is compared with theoretical predictions., Comment: 16 pages, 5 figs

Published
2003

2. Kinematic distributions and nuclear effects of J/psi production in 920-GeV fixed-target proton-nucleus collisions

Author

Y. Vassiliev, A. Bogatyrev, R. Muresan, C. Stegmann, F. Sanchez, S. Karabekyan, C. B. Krauss, A. Belkov, U. Schwanke, T. Buran, Mikhail Zavertyaev, Marco Bruschi, I. Belotelov, H. Kapitza, A. Vitale, D. Reßing, Peter Robmann, Nicola Semprini-Cesari, A. Stanovnik, I. Tikhomirov, C. van Eldik, M. Ispiryan, H. S. Subramania, A. J. Schwartz, Jose M Hernandez, T. Hott, Dmitry Emeliyanov, S. Solunin, P. Conde, J.D. Hansen, Mauro Villa, B. Giacobbe, S. Gradl, I. Matchikhilian, I. Abt, S. Prystupa, M. Nörenberg, A. S. Schwarz, B. Schwenninger, Samo Korpar, Igor Golutvin, H. B. Dreis, Yu.T. Kiryushin, Vladimir Popov, Laura Silva, Maurizio Piccinini, R. Pernack, C. Jiang, Vladislav Balagura, V. Rybnikov, S. De Castro, Z. Zheng, Yu. Zaitsev, S. Shuvalov, M. zur Nedden, M. Schmelling, M. Adams, H. Deppe, F. Eisele, I. Rostovtseva, A. Schreiner, Kwong Lau, Pietro Faccioli, V. Aushev, J. Flammer, O. Barsukova, H. Schröder, Andrej Gorišek, S. Kupper, Wouter Hulsbergen, M. Negodaev, U. Uwer, C. Cruse, F. Grimaldi, M. Poli, M. Danilov, C. Bauer, I. Tsakov, P. Kreuzer, O. Igonkina, M. Symalla, K. T. Knöpfle, I. Gorbounov, B. Fominykh, M. A. Pleier, M. T. Nunez Pardo de Vera, M. Agari, Valery Pugatch, Yu.V. Mikhailov, R. Pestotnik, Thomas Lohse, Laura Fabbri, J. Groth-Jensen, M. Starič, M. Funcke, A. Somov, A. Zhelezov, C. Padilla, M. Bargiotti, Y. Guilitsky, D. C. Goulart, Werner Hofmann, S. Somov, Y. Pylypchenko, Aleksandar Aleksandrov, Sebastian Nowak, D. Wegener, D. Goloubkov, Ulrich Werthenbach, M. Bruinsma, Kendall Reeves, K. M. Danielsen, M. Ouchrif, Reinhard Männer, N.N. Karpenko, K. Ehret, H. Wahlberg, W. Gradl, J. Kessler, Antonio Sbrizzi, J. Gläß, Imma Riu, T. Jagla, X. Dong, P. Križan, A. Golutvin, B. Bobchenko, J. Spengler, I. Kisel, A. Michetti, L. Sozuer, H. Albrecht, B. Lewendel, R. Mankel, R. Wurth, D. Pose, V. Egorytchev, Maksym Titov, M. Mevius, A. Lanyov, A. Gellrich, F. Sciacca, O. Gouchtchine, G. Bohm, Hermann Kolanoski, S. Masciocchi, T. Živko, S. Essenov, S. Keller, D. Krücker, R. Mizuk, Yu. A. Golubkov, A. Bertin, Alexander Spiridonov, S. Xella-Hansen, João Carvalho, B. Schmidt, Peter Buchholz, Y. Bagaturia, S. J. Aplin, Ll. Garrido, B. Schwingenheuer, T. Kvaratskheliia, I. Massa, J. Pyrlik, A. Wurz, Marcus Hohlmann, U. Husemann, R. Zimmermann, J. Batista, J. J. Wang, M. Bräuer, M. Walter, António Amorim, D. Peralta, I. Vukotic, F. Khasanov, H. Rick, R. Spighi, T. Zeuner, E. B. Klinkby, G. Medin, J. Bastos, M. Feuerstack-Raible, Mogens Dam, B. Aa. Petersen, B. Lomonosov, M. Medinnis, Helmut Wolters, A. H. Walenta, Farid Ould-Saada, Antonio Zoccoli, Vasco Amaral, Th. S. Bauer, M. Böcker, PRT, ESP, UKR, CHN, DEU, NOR, USA, FRA, SVN, CHE, DNK, RUS, NLD, DIP. DI FISICA, DIPARTIMENTO DI FISICA E ASTRONOMIA 'AUGUSTO RIGHI', Facolta' di INGEGNERIA, SECONDA FACOLTA' DI INGEGNERIA DELL'UNIVERSITA' DI BOLOGNA CON SEDE CESENA, I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S.J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, TH.S. BAUER, A. BELKOV, AR. BELKOV, I. BELOTELOV, A. BERTIN, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K.M. DANIELSEN, M. DANILOV, S. DE CASTRO, H. DEPPE, X. DONG, H.B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ERHAN, S. ESSENOV, L. FABBRI, P. FACCIOLI, M. FEUERSTACK-RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, LL. GARRIDO, A. GELLRICH, B. GIACOBBE, J. GLA, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D.C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, YU. GUILITSKY, J.D. HANSEN, J.M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, YU. KIRYUSHIN, I. KISEL, E. KLINKBY, K.T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, R. MANKEL, S. MASCIOCCHI, I. MASSA, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, YU. MIKHAILOV, R. MIZUK, R. MURESAN, M.ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M.T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD-SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B.A. PETERSEN, M. PICCININI, M.A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V.M. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. REING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, A. SBRIZZI, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, U. SCHWANKE, ALAN J. SCHWARTZ, ANDREAS S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, N. SEMPRINI-CESARI, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARI&#711, C, C. STEGMANN, H. S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, YU. VASSILIEV, M. VILLA, A. VITALE, I. VUKOTIC, H. WAHLBERG, A. H. WALENTA,M. WALTER, J. J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, S. XELLA-HANSEN, YU. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. &#711, and ZIVKO, A. ZOCCOLI

Subjects
Physics, Particle physics, Meson, Proton, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, DESY, HERA, 01 natural sciences, F region, High Energy Physics - Experiment, Nuclear physics, symbols.namesake, 0103 physical sciences, symbols, Feynman diagram, Production (computer science), High Energy Physics::Experiment, ddc:530, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), HERA-B
Abstract

Measurements of the kinematic distributions of $J/\psi$ mesons produced in $p-$C, $p-$Ti and $p-$W collisions at $\sqrt{s}=41.6 \mathrm{GeV}$ in the Feynman-$x$ region $-0.34 < x_{F} < 0.14$ and for transverse momentum up to $p_T = 5.4 \mathrm{GeV}/c$ are presented. The $x_F$ and $p_T$ dependencies of the nuclear suppression parameter, $\alpha$, are also given. The results are based on $2.4 \cdot 10^{5}$ $J/\psi$ mesons in both the $e^+ e^-$ and $\mu^{+}\mu^{-}$ decay channels. The data have been collected by the HERA-B experiment at the HERA proton ring of the DESY laboratory. The measurement explores the negative region of $x_{F}$ for the first time. The average value of $\alpha$ in the measured $x_{F}$ region is $0.981 \pm 0.015$. The data suggest that the strong nuclear suppression of $J/\psi$ production previously observed at high $x_F$ turns into an enhancement at negative $x_F$., Comment: 19 pages, 11 figures, 6 tables

Published
2009

3. V0 production in p+A collisions at s**(1/2) = 41.6-GeV

Author

I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S. J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, T.H. S. BAUER, A. BELKOV, A.R. BELKOV, I. BELOTELOV, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K. M. DANIELSEN, M. DANILOV, H. DEPPE, X. DONG, H. B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ERHAN, S. ESSENOV, P. FACCIOLI, M. FEUERSTACK RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, L.L. GARRIDO, A. GELLRICH, B. GIACOBBE, J. GLA, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D. C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, Y.U. GUILITSKY, J. D. HANSEN, J. M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, Y.U. KIRYUSHIN, I. KISEL, E. KLINKBY, K. T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, R. MANKEL, S. MASCIOCCHI, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, Y.U. MIKHAILOV, R. MIZUK, R. MURESAN, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M. T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B. A. PETERSEN, M. A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V. M. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. REING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, U. SCHWANKE, ALAN J. SCHWARTZ, ANDREAS S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARI, 711, C, C. STEGMANN, H. S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, Y.U. VASSILIEV, I. VUKOTIC, H. WAHLBERG, A. H. WALENTA, M. WALTER, J. J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, S. XELLA HANSEN, Y.U. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. , #711, BERTIN, ANTONIO, DE CASTRO, STEFANO, FABBRI, LAURA, MASSA, IGNAZIO GIACOMO, PICCININI, MAURIZIO, SBRIZZI, ANTONIO, SEMPRINI CESARI, NICOLA, VILLA, MAURO, VITALE, ANTONIO, ZOCCOLI, ANTONIO, I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S.J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, TH.S. BAUER, A. BELKOV, AR. BELKOV, I. BELOTELOV, A. BERTIN, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K.M. DANIELSEN, M. DANILOV, S. DE CASTRO, H. DEPPE, X. DONG, H.B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ERHAN, S. ESSENOV, L. FABBRI, P. FACCIOLI, M. FEUERSTACK-RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, LL. GARRIDO, A. GELLRICH, B. GIACOBBE, J. GLA, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D.C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, YU. GUILITSKY, J.D. HANSEN, J.M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, YU. KIRYUSHIN, I. KISEL, E. KLINKBY, K.T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, R. MANKEL, S. MASCIOCCHI, I. MASSA, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, YU. MIKHAILOV, R. MIZUK, R. MURESAN, M.ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M.T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD-SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B.A. PETERSEN, M. PICCININI, M.A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V.M. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. REING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, A. SBRIZZI, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, U. SCHWANKE, ALAN J. SCHWARTZ, ANDREAS S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, N. SEMPRINI-CESARI, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARI&#711, C, C. STEGMANN, H. S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, YU. VASSILIEV, M. VILLA, A. VITALE, I. VUKOTIC, H. WAHLBERG, A. H. WALENTA,M. WALTER, J. J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, S. XELLA-HANSEN, YU. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. &#711, and ZIVKO, A. ZOCCOLI

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

Inclusive doubly differential cross sections d^2sigma_{pA}/dx_Fdp_T^2 as a function of Feynman-x (x_F) and transverse momentum (p_T) for the production of K^0_s, Lambda^0 and anti-Lambda^0 in proton-nucleus interactions at 920 GeV are presented. The measurements were performed by HERA-B in the negative x_F range (-0.12

Published
2009

4. Production of the Charmonium States $\chi_{c1}$ and $\chi_{c2}$ in Proton Nucleus Interactions at $\sqrt{s} = 41.6$GeV

Author

I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEXANDROV, V. AMARAL, A. AMORIM, S. J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, T. S. BAUER, A. BELKOV, A.R. BELKOV, I. BELOTELOV, B. BOBCHENKO, M. BOECKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K. M. DANIELSEN, M. DANILOV, H. DEPPE, X. DONG, H. B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, P. FACCIOLI, M. FEUERSTACK RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, L. GARRIDO, A. GELLRICH, B. GIACOBBE, J. GLAESS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D. C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, J. GROTH JENSEN, Y.U. GUILITSKY, J. D. HANSEN, J. M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, Y.U. KIRYUSHIN, I. KISEL, E. KLINKBY, K. T. KNOEPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUECKER, S. KUPPER, T. KVARATSSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MAENNER, R. MANKEL, S. MASCIOCCHI, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, Y.U. MIKHAILOV, R. MIZUK, R. MURESAN, M. ZUR NEDDEN, M. NEGODAEV, M. NOERENBERG, S. NOWAK, M. T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B. A. PETERSEN, M. A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHROEDER, U. SCHWANKE, A. J. SCHWARTZ, A. S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H. S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, Y.U. VASSILIEV, I. VUKOTIC, H. WAHLBERG, A. H. WALENTA, M. WALTER, J. J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, S. XELLA HANSEN, Y.U. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, BERTIN, ANTONIO, DE CASTRO, STEFANO, FABBRI, LAURA, MASSA, IGNAZIO GIACOMO, PICCININI, MAURIZIO, SBRIZZI, ANTONIO, SEMPRINI CESARI, NICOLA, VILLA, MAURO, VITALE, ANTONIO, ZOCCOLI, ANTONIO, I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEXANDROV, V. AMARAL, A. AMORIM, S. J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, T. S. BAUER, A. BELKOV, AR. BELKOV, I. BELOTELOV, A. BERTIN, B. BOBCHENKO, M. BOECKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K. M. DANIELSEN, M. DANILOV, S. DE CASTRO, H. DEPPE, X. DONG, H. B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, L. FABBRI, P. FACCIOLI, M. FEUERSTACK-RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, L. GARRIDO, A. GELLRICH, B. GIACOBBE, J. GLAESS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D. C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, J. GROTH-JENSEN, YU. GUILITSKY, J. D. HANSEN, J. M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, YU. KIRYUSHIN, I. KISEL, E. KLINKBY, K. T. KNOEPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUECKER, S. KUPPER, T. KVARATSSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MAENNER, R. MANKEL, S. MASCIOCCHI, I. MASSA, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, YU. MIKHAILOV, R. MIZUK, R.MURESAN, M. ZUR NEDDEN, M. NEGODAEV, M. NOERENBERG, S. NOWAK, M. T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD-SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B. A. PETERSEN, M. PICCININI, M. A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, A. SBRIZZI, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHROEDER, U. SCHWANKE, A. J. SCHWARTZ, A. S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, N. SEMPRINI-CESARI, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H. S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, YU. VASSILIEV, M. VILLA, A. VITALE, I. VUKOTIC, H. WAHLBERG, A. H. WALENTA, M. WALTER, J. J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, S. XELLA-HANSEN, YU. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, and A. ZOCCOLI

Subjects
High Energy Physics::Experiment, ddc:530, High Energy Physics - Experiment
Abstract

A measurement of the ratio R_chic = (chic -> Jpsi + gam)/ Jpsi in pC, pTi and pW interactions at 920 GeV/c (sqrt{s}=41.6 GeV) in the Feynman-x range -0.35 < x_F(Jpsi) < 0.15 is presented. Both mu+mu- and e+e- Jpsi decay channels are observed with an overall statistics of about 15000 chic events, which is by far the largest available sample in pA collisions. The result is R_chic = 0.188+-0.013(st)(+0.024)(-0.022)(sys) averaged over the different materials, when no Jpsi and chic polarisations are considered. The chic_1 to chic_2 production ratio R_12 = R_chic1/R_chic2 is measured to be 1.02+-0.40, leading to a cross section ratio sigma(chic_1)/sigma(chic_2)=0.57+-0.23. The dependence of R_chic on the Feynman-x of the Jpsi, x_F(Jpsi), and its transverse momentum, p_T(Jpsi), is studied, as well as its dependence on the atomic number, A, of the target. For the first time, an extensive study of possible biases on R_chic and R_12 due to the dependence of acceptance on the polarization states of Jpsi and chic is performed. By varying the polarisation parameter, lambda(obs), of all produced Jpsi's by two sigma around the value measured by HERA-B, and considering the maximum variation due to the possible chic_1 and chic_2 polarisations, it is shown that R_chic could change by a factor between 1.02 and 1.21 and R_12 by a factor between 0.89 and 1.16., Comment: 19 pages, 7 figures

Published
2008

5. Luminosity determination at HERA-B

Author

I. Matchikhilian, T. Hott, Laura Silva, P. Conde, Igor Golutvin, Yu. Zaitsev, Y. Guilitsky, K. T. Knöpfle, Y. Pylypchenko, M. Bruinsma, Kendall Reeves, Maurizio Piccinini, I. Massa, K. Ehret, R. Pernack, J. Kessler, Antonio Sbrizzi, C. Cruse, M. A. Pleier, L. Sozuer, J. Spengler, Marcus Hohlmann, T. Jagla, X. Dong, S. Solunin, Th. S. Bauer, U. Husemann, R. Zimmermann, Imma Riu, P. Križan, A. Golutvin, B. Bobchenko, A. Lanyov, M. Böcker, C. Stegmann, Antonio Zoccoli, I. Abt, Wouter Hulsbergen, F. Sciacca, I. Kisel, V. Rybnikov, Maksym Titov, A. Wurz, J. J. Wang, M. Poli, A. Vitale, N.N. Karpenko, F. Eisele, R. Muresan, S. Xella-Hansen, D. Reßing, A. J. Schwartz, A. Belkov, Jose M Hernandez, A. H. Walenta, Thomas Lohse, H. B. Dreis, Vladimir Popov, E. B. Klinkby, M. Bräuer, Valery Pugatch, A. Schreiner, M. Walter, O. Barsukova, T. Živko, B. Giacobbe, S. Essenov, S. Keller, J. Batista, M. Danilov, M. T. Nunez Pardo de Vera, M. Agari, C. Bauer, Peter Buchholz, H. Albrecht, Y. Bagaturia, S. Prystupa, A. Zhelezov, Ulrich Werthenbach, Vasco Amaral, R. Mankel, D. Goloubkov, M. zur Nedden, I. Gorbounov, Kwong Lau, R. Wurth, D. Pose, Ll. Garrido, S. De Castro, T. Kvaratskheliia, A. Bogatyrev, O. Igonkina, B. Aa. Petersen, C. B. Krauss, António Amorim, D. Peralta, U. Uwer, H. Deppe, T. Buran, I. Rostovtseva, M. Nörenberg, M. Funcke, F. Sanchez, I. Vukotic, I. Belotelov, I. Tikhomirov, Andrej Gorišek, R. Mizuk, U. Schwanke, H. Rick, B. Schwenninger, M. Starič, A. Stanovnik, A. Somov, Helmut Wolters, Yu.T. Kiryushin, H. S. Subramania, Mikhail Zavertyaev, T. Zeuner, Farid Ould-Saada, S. Masciocchi, V. Egorytchev, J. Bastos, M. Feuerstack-Raible, A. S. Schwarz, Mogens Dam, R. Pestotnik, M. Adams, A. Michetti, S. Shuvalov, Mauro Villa, M. Mevius, Samo Korpar, M. Negodaev, B. Lewendel, B. Fominykh, Yu.V. Mikhailov, B. Lomonosov, M. Medinnis, D. C. Goulart, Werner Hofmann, A. Gellrich, Nicola Semprini-Cesari, O. Gouchtchine, G. Bohm, I. Tsakov, Hermann Kolanoski, S. Kupper, R. Spighi, P. Kreuzer, M. Symalla, B. Schmidt, K. M. Danielsen, Reinhard Männer, Marco Bruschi, Dmitry Emeliyanov, M. Ispiryan, S. Gradl, S. J. Aplin, F. Khasanov, Vladislav Balagura, Y. Vassiliev, J. Pyrlik, A. Bertin, C. Jiang, Z. Zheng, Alexander Spiridonov, Laura Fabbri, J. Groth-Jensen, S. Karabekyan, G. Medin, M. Bargiotti, C. Padilla, João Carvalho, Sebastian Nowak, B. Schwingenheuer, D. Wegener, H. Kapitza, C. van Eldik, H. Wahlberg, W. Gradl, D. Krücker, Yu. A. Golubkov, J. Gläß, Pietro Faccioli, V. Aushev, F. Grimaldi, S. Somov, Aleksandar Aleksandrov, M. Ouchrif, M. Schmelling, J. Flammer, H. Schröder, Peter Robmann, J.D. Hansen, I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S.J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, TH.S. BAUER, A. BELKOV, AR. BELKOV, I. BELOTELOV, A. BERTIN, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K.M. DANIELSEN, M. DANILOV, S. DE CASTRO, H. DEPPE, X. DONG, H.B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, L. FABBRI, P. FACCIOLI, M. FEUERSTACK-RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, LL. GARRIDO, A. GELLRICH, B. GIACOBBE, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D.C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, J. GROTH-JENSEN, YU. GUILITSKY, J.D. HANSEN, J.M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, YU. KIRYUSHIN, I. KISEL, E. KLINKBY, K.T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, R. MANKEL, S. MASCIOCCHI, I. MASSA, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, YU. MIKHAILOV, R. MIZUK, R. MURESAN, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M.T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD-SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B.AA. PETERSEN, M. PICCININI, M.A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, A. SBRIZZI, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, U. SCHWANKE, A.J. SCHWARTZ, A.S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, N. SEMPRINI-CESARI, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H.S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, YU. VASSILIEV, M. VILLA, A. VITALE, I. VUKOTIC, H. WAHLBERG, A.H. WALENTA, M. WALTER, J.J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, S. XELLA-HANSEN, YU. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMAN, T. ZIVKO, and A. ZOCCOLI

Subjects
Physics, Nuclear and High Energy Physics, Measurement method, Luminosity (scattering theory), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, HERA, 01 natural sciences, Measure (mathematics), Nuclear physics, Delta ray, Physics - Data Analysis, Statistics and Probability, 0103 physical sciences, ddc:530, High Energy Physics::Experiment, 010303 astronomy & astrophysics, Instrumentation, HERA-B
Abstract

A detailed description of an original method used to measure the luminosity accumulated by the HERA-B experiment for a data sample taken during the 2002-2003 HERA running period is reported. We show that, with this method, a total luminosity measurement can be achieved with a typical precision, including overall systematic uncertainties, at a level of 5% or better. We also report evidence for the detection of delta-rays generated in the target and comment on the possible use of such delta rays to measure luminosity., Comment: 24 pages, 5 figures

Published
2007

6. A Measurement of the psi ' to J/psi production ratio in 920 GeV proton-nucleus interactions

Author

Pietro Faccioli, V. Aushev, F. Grimaldi, Y. Vassiliev, C. Jiang, A. Spiridonov, S. Karabekyan, C. van Eldik, M. Schmelling, M. Bargiotti, H. Schröder, Sebastian Nowak, D. Wegener, B. Aa. Petersen, H. Deppe, H. Wahlberg, W. Gradl, S. Somov, M. Ouchrif, Peter Robmann, S. Essenov, Helmut Wolters, F. Eisele, Farid Ould-Saada, M. Adams, I. Massa, N.N. Karpenko, Rok Pestotnik, O. Barsukova, Wouter Hulsbergen, R. Muresan, I. Rostovtseva, A. H. Walenta, M. Symalla, S. De Castro, S. Kupper, L. Sozuer, I. Kisel, R. Mizuk, H. Albrecht, R. Mankel, Laura Fabbri, J. Groth-Jensen, F. Khasanov, R. Wurth, D. Pose, O. Igonkina, C. Padilla, M. Negodaev, M. Poli, Y. Guilitsky, Antonio Zoccoli, T. Živko, I. Tikhomirov, A. Aleksandrov, K. Ehret, J. Kessler, Antonio Sbrizzi, B. Lomonosov, A. Michetti, Thomas Lohse, S. Keller, T. Jagla, A. Belkov, M. Medinnis, X. Dong, J. Gläß, B. Lewendel, Vasco Amaral, Valery Pugatch, Mikhail Danilov, Dmitry Emeliyanov, Maksym Titov, A. Schreiner, J.D. Hansen, M. Nörenberg, A. Wurz, A. Gellrich, A. Zhelezov, Y. Bagaturia, A. Bogatyrev, Nicola Semprini-Cesari, A. S. Schwarz, Mogens Dam, B. Fominykh, Yu.V. Mikhailov, O. Gouchtchine, E. B. Klinkby, A. J. Schwartz, Jose M Hernandez, C. B. Krauss, Z. Zheng, T. Buran, A. Gorisek, Bernhard Schmidt, K. T. Knöpfle, Laura Silva, Jian Wang, G. Bohm, D. C. Goulart, B. Giacobbe, I. Belotelov, Hermann Kolanoski, V. Popov, Werner Hofmann, B. Schwenninger, I. Tsakov, M. T. Nunez Pardo de Vera, M. Agari, Yu.T. Kiryushin, F. Sanchez, S. Prystupa, J. Spengler, H. S. Subramania, M. Feuerstack-Raible, G. Medin, Ulrich Werthenbach, I. Matchikhilian, Th. S. Bauer, S. Shuvalov, V. Rybnikov, U. Schwanke, Maurizio Piccinini, Mikhail Zavertyaev, R. Pernack, S. Solunin, D. Goloubkov, J. Bastos, A. Lanyov, M. Böcker, I. Abt, Marco Bruschi, F. Sciacca, C. Bauer, Peter Buchholz, Mauro Villa, H. B. Dreis, Samo Korpar, D. Reßing, I. Gorbounov, T. Kvaratskheliia, M. Funcke, M. Starič, A. Somov, Y. Pylypchenko, C. Stegmann, A. Vitale, Imma Riu, P. Križan, S. Masciocchi, A. Golutvin, B. Bobchenko, R. Spighi, S. J. Aplin, V. Egorytchev, B. Schwingenheuer, M. Bräuer, M. Walter, António Amorim, Marcus Hohlmann, U. Husemann, R. Zimmermann, J. Pyrlik, J. Batista, D. Peralta, João Carvalho, H. Kapitza, I. Vukotic, Yu. A. Golubkov, A. Bertin, H. Rick, P. Kreuzer, T. Zeuner, J. Flammer, K. M. Danielsen, M. Bruinsma, Kendall Reeves, M. Ispiryan, S. Gradl, Vladislav Balagura, D. Krucker, M. zur Nedden, Kwong Lau, R. Manner, U. Uwer, A. Stanovnik, M. Mevius, C. Cruse, M. A. Pleier, T. Hott, P. Conde, Igor Golutvin, Yu. Zaitsev, L. Garrido, I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S.J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, TH.S. BAUER, A. BELKOV, AR. BELKOV, I. BELOTELOV, A. BERTIN, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K.M. DANIELSEN, M. DANILOV, S. DE CASTRO, H. DEPPE, X. DONG, H.B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ERHAN, S. ESSENOV, L. FABBRI, P. FACCIOLI, M. FEUERSTACK-RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, LL. GARRIDO, A. GELLRICH, B. GIACOBBE, J. GLA, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D.C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, YU. GUILITSKY, J.D. HANSEN, J.M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, YU. KIRYUSHIN, I. KISEL, E. KLINKBY, K.T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, R. MANKEL, S. MASCIOCCHI, I. MASSA, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, YU. MIKHAILOV, R. MIZUK, R. MURESAN, M.ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M.T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD-SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B.A. PETERSEN, M. PICCININI, M.A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V.M. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. REING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, A. SBRIZZI, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, U. SCHWANKE, ALAN J. SCHWARTZ, ANDREAS S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, N. SEMPRINI-CESARI, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H.S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, YU. VASSILIEV, M. VILLA, A. VITALE, I. VUKOTIC, H. WAHLBERG, A.H. WALENTA, M. WALTER, J.J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, YU. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, A. ZOCCOLI, Geometry, (Astro)-Particles Physics, and Mathematical Analysis

Subjects
Physics and Astronomy (miscellaneous), Nuclear Theory, Electron, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, 0103 physical sciences, medicine, SDG 7 - Affordable and Clean Energy, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, Muon, 010308 nuclear & particles physics, Branching fraction, High Energy Physics::Phenomenology, HERA, Polarization (waves), 3. Good health, medicine.anatomical_structure, High Energy Physics::Experiment, Nucleus, Storage ring, HERA-B
Abstract

Ratios of the Psi' over the J/psi production cross sections in the dilepton channel for C, Ti and W targets have been measured in 920 GeV proton-nucleus interactions with the HERA-B detector at the HERA storage ring. The Psi' and J/psi states were reconstructed in both the mu+mu- and the e+e- decay modes. The measurements covered the kinematic range -0.35 < x_F < 0.1 with transverse momentum p_T < 4.5 GeV/c. The Psi' to J/psi production ratio is almost constant in the covered x_F range and shows a slow increase with p_T. The angular dependence of the ratio has been used to measure the difference of the Psi' and J/psi polarization. All results for the muon and electron decay channels are in good agreement: their ratio, averaged over all events, is R_psi'(mu)/R_psi'(e)=1.00+-0.08+-0.04. This result constitutes a new, direct experimental constraint on the double ratio of branching fractions, (B'(mu)*B(e))/(B(mu)*B'(e)), of Psi' and J/psi in the two channels., Comment: 20 pages, 9 figures

Published
2007

7. Polarization of Lambda and anti-Lambda in 920-GeV fixed-target proton-nucleus collisions

Author

I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S. J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, T.H. S. BAUER, A. BELKOV, A.R. BELKOV, I. BELOTELOV, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K. M. DANIELSEN, M. DANILOV, H. DEPPE, X. DONG, H. B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ERHAN, S. ESSENOV, M. FEUERSTACK RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, L.L. GARRIDO, A. GELLRICH, B. GIACOBBE, J. GLA, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D. C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, Y.U. GUILITSKY, J. D. HANSEN, J. M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, Y.U. KIRYUSHIN, I. KISEL, E. KLINKBY, K. T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, R. MANKEL, S. MASCIOCCHI, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, Y.U. MIKHAILOV, R. MIZUK, R. MURESAN, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M. T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B. A. PETERSEN, M. A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V. M. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. REING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, U. SCHWANKE, ALAN J. SCHWARTZ, ANDREAS S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H. S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, Y.U. VASSILIEV, I. VUKOTIC, H. WAHLBERG, A. H. WALENTA, M. WALTER, J. J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, Y.U. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, BERTIN, ANTONIO, DE CASTRO, STEFANO, FABBRI, LAURA, FACCIOLI, PIETRO, MASSA, IGNAZIO GIACOMO, PICCININI, MAURIZIO, SBRIZZI, ANTONIO, SEMPRINI CESARI, NICOLA, VILLA, MAURO, VITALE, ANTONIO, ZOCCOLI, ANTONIO, I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S.J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, TH.S. BAUER, A. BELKOV, AR. BELKOV, I. BELOTELOV, A. BERTIN, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K.M. DANIELSEN, M. DANILOV, S. DE CASTRO, H. DEPPE, X. DONG, H.B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ERHAN, S. ESSENOV, L. FABBRI, P. FACCIOLI, M. FEUERSTACK-RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, LL. GARRIDO, A. GELLRICH, B. GIACOBBE, J. GLA, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D.C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, YU. GUILITSKY, J.D. HANSEN, J.M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, YU. KIRYUSHIN, I. KISEL, E. KLINKBY, K.T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, R. MANKEL, S. MASCIOCCHI, I. MASSA, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, YU. MIKHAILOV, R. MIZUK, R. MURESAN, M.ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M.T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD-SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B.A. PETERSEN, M. PICCININI, M.A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V.M. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. REING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, A. SBRIZZI, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, U. SCHWANKE, ALAN J. SCHWARTZ, ANDREAS S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, N. SEMPRINI-CESARI, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H.S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, YU. VASSILIEV, M. VILLA, A. VITALE, I. VUKOTIC, H. WAHLBERG, A.H. WALENTA, M. WALTER, J.J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, YU. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, and A. ZOCCOLI

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

A measurement of the polarization of Lambda and Anti-Lambda baryons produced in pC and pW collisions at sqrt(s)=41.6 GeV has been performed with the HERA-B spectrometer. The measurements cover the kinematic range of 0.6 GeV/c < p_T

Published
2006

8. Measurement of the J/Psi Production Cross Section in 920 GeV/c Fixed-Target Proton-Nucleus Interactions

Author

I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S. J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, T.H. S. BAUER, A. BELKOV, A.R. BELKOV, I. BELOTELOV, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K. M. DANIELSEN, M. DANILOV, H. DEPPE, X. DONG, H. B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, M. FEUERSTACK RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, L.L. GARRIDO, A. GELLRICH, B. GIACOBBE, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D. C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, Y.U. GUILITSKY, J. D. HANSEN, J. M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, Y.U. KIRYUSHIN, I. KISEL, E. KLINKBY, K. T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, R. MANKEL, S. MASCIOCCHI, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, Y.U. MIKHAILOV, R. MIZUK, R. MURESAN, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M. T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B. A.A. PETERSEN, M. A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V. M. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, U. SCHWANKE, ALAN J. SCHWARTZ, ANDREAS S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H. S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, Y.U. VASSILIEV, I. VUKOTIC, H. WAHLBERG, A. H. WALENTA, M. WALTER, J. J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, Y.U. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, BERTIN, ANTONIO, DE CASTRO, STEFANO, FABBRI, LAURA, FACCIOLI, PIETRO, MASSA, IGNAZIO GIACOMO, PICCININI, MAURIZIO, SBRIZZI, ANTONIO, SEMPRINI CESARI, NICOLA, VILLA, MAURO, VITALE, ANTONIO, ZOCCOLI, ANTONIO, I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S.J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, TH.S. BAUER, A. BELKOV, AR. BELKOV, I. BELOTELOV, A. BERTIN, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K.M. DANIELSEN, M. DANILOV, S. DE CASTRO, H. DEPPE, X. DONG, H.B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, L. FABBRI, P. FACCIOLI, M. FEUERSTACK-RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, LL. GARRIDO, A. GELLRICH, B. GIACOBBE, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D.C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, YU. GUILITSKY, J.D. HANSEN, J.M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, YU. KIRYUSHIN, I. KISEL, E. KLINKBY, K.T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, R. MANKEL, S. MASCIOCCHI, I. MASSA, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, YU. MIKHAILOV, R. MIZUK, R. MURESAN, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M.T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD-SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B.AA. PETERSEN, M. PICCININI, M.A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V.M. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, A. SBRIZZI, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, U. SCHWANKE, ALAN J. SCHWARTZ, ANDREAS S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, N. SEMPRINI-CESARI, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H.S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, YU. VASSILIEV, M. VILLA, A. VITALE, I. VUKOTIC, H. WAHLBERG, A.H. WALENTA, M. WALTER, J.J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, YU. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, and A. ZOCCOLI

Subjects
Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

The mid-rapidity (dsigma_(pN)/dy at y=0) and total sigma_(pN) production cross sections of J/Psi mesons are measured in proton-nucleus interactions. Data collected by the HERA-B experiment in interactions of 920 GeV/c protons with carbon, titanium and tungsten targets are used for this analysis. The J/Psi mesons are reconstructed by their decay into lepton pairs. The total production cross section obtained is sigma_(pN)(J/Psi) = 663 +- 74 +- 46 nb/nucleon. In addition, our result is compared with previous measurements.

Published
2006

9. Improved Measurement of the b-bbar Production Cross Section in 920 GeV Fixed-Target Proton-Nucleus Collisions

Author

I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S. J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, T.H. S. BAUER, A. BELKOV, A.R. BELKOV, I. BELOTELOV, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K. M. DANIELSEN, M. DANILOV, H. DEPPE, X. DONG, H. B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, M. FEUERSTACK RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, L.L. GARRIDO, A. GELLRICH, B. GIACOBBE, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D. C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, Y.U. GUILITSKY, J. D. HANSEN, J. M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, Y.U. KIRYUSHIN, I. KISEL, E. KLINKBY, K. T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, R. MANKEL, S. MASCIOCCHI, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, Y.U. MIKHAILOV, R. MIZUK, R. MURESAN, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M. T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B. A.A. PETERSEN, M. A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V. M. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. REING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, U. SCHWANKE, ALAN J. SCHWARTZ, ANDREAS S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H. S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, Y.U. VASSILIEV, I. VUKOTIC, H. WAHLBERG, A. H. WALENTA, M. WALTER, J. J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, Y.U. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, BERTIN, ANTONIO, DE CASTRO, STEFANO, FABBRI, LAURA, FACCIOLI, PIETRO, GIOVANNINI, PAOLA, MASSA, IGNAZIO GIACOMO, PICCININI, MAURIZIO, SBRIZZI, ANTONIO, SEMPRINI CESARI, NICOLA, VILLA, MAURO, VITALE, ANTONIO, ZOCCOLI, ANTONIO, I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S.J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, TH.S. BAUER, A. BELKOV, AR. BELKOV, I. BELOTELOV, A. BERTIN, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K.M. DANIELSEN, M. DANILOV, S. DE CASTRO, H. DEPPE, X. DONG, H.B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, L. FABBRI, P. FACCIOLI, M. FEUERSTACK-RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, LL. GARRIDO, A. GELLRICH, B. GIACOBBE, P. GIOVANNINI, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D.C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, YU. GUILITSKY, J.D. HANSEN, J.M. HERNANDEZ, W. HOFMANN, M. HOHLMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, YU. KIRYUSHIN, I. KISEL, E. KLINKBY, K.T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, R. MANKEL, S. MASCIOCCHI, I. MASSA, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, YU. MIKHAILOV, R. MIZUK, R. MURESAN, M.ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M.T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD-SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, B.AA. PETERSEN, M. PICCININI, M.A. PLEIER, M. POLI, V. POPOV, D. POSE, S. PRYSTUPA, V.M. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. REING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, A. SBRIZZI, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, U. SCHWANKE, ALAN J. SCHWARTZ, ANDREAS S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, N. SEMPRINI-CESARI, S. SHUVALOV, L. SILVA, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H.S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, YU. VASSILIEV, M. VILLA, A. VITALE, I. VUKOTIC, H. WAHLBERG, A.H. WALENTA, M. WALTER, J.J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, YU. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, and A. ZOCCOLI

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

A new measurement of the b-bbar production cross section in 920 GeV proton-nucleus collisions is presented by the HERA-B collaboration. The b-bbar production is tagged via inclusive bottom quark decays into J/psi mesons, by exploiting the longitudinal separation of J/psi->ll decay vertices from the primary proton-nucleus interaction point. Both e+e- and mu+mu- channels are reconstructed, for a total of 83 +- 12 inclusive b->J/psi X events found. The combined analysis yields a b-bbar to prompt J/psi cross section ratio of {frac{{Deltasigma(bbbar)}}{{Deltasigma_{jpsi}}}} = 0.032pm 0.005 stat pm 0.004 sys measured in the x_f acceptance (-0.35

Published
2006

10. Search for the flavor-changing neutral current decay D(0) ->mu(+)mu(-) with the HERA-B detector

Author

I. ABT, M. ADAMS, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S. J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, T.H. S. BAUER, A. BELKOV, A.R. BELKOV, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, M. BUCHLER, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K. M. DANIELSEN, M. DANILOV, H. DEPPE, X. DONG, H. B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, M. FEUERSTACK RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, L.L. GARRIDO, B. GIACOBBE, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D. C. GOULART, S. GRADL, W. GRADL, Y.U. GUILITSKY, J. D. HANSEN, R. HARR, J. M. HERNANDEZ, W. HOFMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, P. KARCHIN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, Y.U. KIRYUSHIN, K. T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, S. MASCIOCCHI, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, Y.U. MIKHAILOV, R. MIZUK, R. MURESAN, S. NAM, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M. T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, M. A. PLEIER, M. POLI, V. POPOV, A. POSE, D. POSE, S. PRYSTUPA, V. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, V. RYBNIKOV, F. SANCHEZ, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, A. J. SCHWARTZ, A. S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, J. SHIU, S. SHUVALOV, L. SILVA, K. SMIRNOV, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H. S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, Y.U. VASSILIEV, I. VUKOTIC, H. WAHLBERG, A. H. WALENTA, M. WALTER, J. J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, Y.U. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, BARGIOTTI, MARIANNE, BERTIN, ANTONIO, DE CASTRO, STEFANO, FABBRI, LAURA, FACCIOLI, PIETRO, GRIMALDI, FILIPPO, MASSA, IGNAZIO GIACOMO, PICCININI, MAURIZIO, SBRIZZI, ANTONIO, SEMPRINI CESARI, NICOLA, VILLA, MAURO, VITALE, ANTONIO, ZOCCOLI, ANTONIO, I. ABT, M. ADAMS, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S.J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, TH.S. BAUER, A. BELKOV, AR. BELKOV, A. BERTIN, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, M. BUCHLER, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K.M. DANIELSEN, M. DANILOV, S. DE CASTRO, H. DEPPE, X. DONG, H.B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, L. FABBRI, P. FACCIOLI, M. FEUERSTACK-RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, LL. GARRIDO, B. GIACOBBE, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D.C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, YU. GUILITSKY, J.D. HANSEN, R. HARR, J.M. HERNANDEZ, W. HOFMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, P. KARCHIN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, YU. KIRYUSHIN, K.T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, S. MASCIOCCHI, I. MASSA, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, YU. MIKHAILOV, R. MIZUK, R. MURESAN, S. NAM, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M.T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD-SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, M. PICCININI, M.A. PLEIER, M. POLI, V. POPOV, A. POSE, D. POSE, S. PRYSTUPA, V. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, V. RYBNIKOV, F. SANCHEZ, A. SBRIZZI, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, A.J. SCHWARTZ, A.S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, N. SEMPRINI-CESARI, J. SHIU, S. SHUVALOV, L. SILVA, K. SMIRNOV, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H.S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, YU. VASSILIEV, M. VILLA, A. VITALE, I. VUKOTIC, H. WAHLBERG, A.H. WALENTA, M. WALTER, J.J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, YU. ZAITSEV, M. ZAVERTYAEV, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, and A. ZOCCOLI

Abstract

We report on a search for the flavor-changing neutral current decay $D^0 to mu^+mu^-$ using $50 times 10^6$ events recorded with a dimuon trigger in interactions of 920 GeV protons with nuclei by the HERA-B experiment. We find no evidence for such decays and set a 90% confidence level upper limit on the branching fraction $Br(D^0 to mu^+mu^-)

Published
2004

11. Limits for the central production of Theta(+) and Xi(--) pentaquarks in 920-GeV pA collisions

Author

I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S. J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, T.H. S. BAUER, A. BELKOV, A.R. BELKOV, I. BELOTELOV, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K. M. DANIELSEN, M. DANILOV, H. DEPPE, X. DONG, H. B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, M. FEUERSTACK RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, L.L. GARRIDO, B. GIACOBBE, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D. C. GOULART, S. GRADL, W. GRADL, Y.U. GUILITSKY, J. D. HANSEN, J. M. HERNANDEZ, W. HOFMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, Y.U. KIRYUSHIN, K. T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, S. MASCIOCCHI, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, Y.U. MIKHAILOV, R. MIZUK, R. MURESAN, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M. T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, M. A. PLEIER, M. POLI, V. POPOV, A. POSE, D. POSE, S. PRYSTUPA, V. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, A. J. SCHWARTZ, A. S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, S. SHUVALOV, L. SILVA, K. SMIRNOV, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H. S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, Y.U. VASSILIEV, I. VUKOTIC, H. WAHLBERG, A. H. WALENTA, M. WALTER, J. J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, Y.U. ZAITSEV, M. ZAVERTYAEV, G. ZECH, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, BARGIOTTI, MARIANNE, BERTIN, ANTONIO, DE CASTRO, STEFANO, FABBRI, LAURA, FACCIOLI, PIETRO, GRIMALDI, FILIPPO, MASSA, IGNAZIO GIACOMO, PICCININI, MAURIZIO, SBRIZZI, ANTONIO, SEMPRINI CESARI, NICOLA, VILLA, MAURO, VITALE, ANTONIO, ZOCCOLI, ANTONIO, I. ABT, M. ADAMS, M. AGARI, H. ALBRECHT, A. ALEKSANDROV, V. AMARAL, A. AMORIM, S.J. APLIN, V. AUSHEV, Y. BAGATURIA, V. BALAGURA, M. BARGIOTTI, O. BARSUKOVA, J. BASTOS, J. BATISTA, C. BAUER, TH.S. BAUER, A. BELKOV, AR. BELKOV, I. BELOTELOV, A. BERTIN, B. BOBCHENKO, M. BOCKER, A. BOGATYREV, G. BOHM, M. BRAUER, M. BRUINSMA, M. BRUSCHI, P. BUCHHOLZ, T. BURAN, J. CARVALHO, P. CONDE, C. CRUSE, M. DAM, K.M. DANIELSEN, M. DANILOV, S. DE CASTRO, H. DEPPE, X. DONG, H.B. DREIS, V. EGORYTCHEV, K. EHRET, F. EISELE, D. EMELIYANOV, S. ESSENOV, L. FABBRI, P. FACCIOLI, M. FEUERSTACK-RAIBLE, J. FLAMMER, B. FOMINYKH, M. FUNCKE, LL. GARRIDO, B. GIACOBBE, J. GLASS, D. GOLOUBKOV, Y. GOLUBKOV, A. GOLUTVIN, I. GOLUTVIN, I. GORBOUNOV, A. GORISEK, O. GOUCHTCHINE, D.C. GOULART, S. GRADL, W. GRADL, F. GRIMALDI, YU. GUILITSKY, J.D. HANSEN, J.M. HERNANDEZ, W. HOFMANN, T. HOTT, W. HULSBERGEN, U. HUSEMANN, O. IGONKINA, M. ISPIRYAN, T. JAGLA, C. JIANG, H. KAPITZA, S. KARABEKYAN, N. KARPENKO, S. KELLER, J. KESSLER, F. KHASANOV, YU. KIRYUSHIN, K.T. KNOPFLE, H. KOLANOSKI, S. KORPAR, C. KRAUSS, P. KREUZER, P. KRIZAN, D. KRUCKER, S. KUPPER, T. KVARATSKHELIIA, A. LANYOV, K. LAU, B. LEWENDEL, T. LOHSE, B. LOMONOSOV, R. MANNER, S. MASCIOCCHI, I. MASSA, I. MATCHIKHILIAN, G. MEDIN, M. MEDINNIS, M. MEVIUS, A. MICHETTI, YU. MIKHAILOV, R. MIZUK, R. MURESAN, M. ZUR NEDDEN, M. NEGODAEV, M. NORENBERG, S. NOWAK, M.T. NUNEZ PARDO DE VERA, M. OUCHRIF, F. OULD-SAADA, C. PADILLA, D. PERALTA, R. PERNACK, R. PESTOTNIK, M. PICCININI, M.A. PLEIER, M. POLI, V. POPOV, A. POSE, D. POSE, S. PRYSTUPA, V. PUGATCH, Y. PYLYPCHENKO, J. PYRLIK, K. REEVES, D. RESSING, H. RICK, I. RIU, P. ROBMANN, I. ROSTOVTSEVA, V. RYBNIKOV, F. SANCHEZ, A. SBRIZZI, M. SCHMELLING, B. SCHMIDT, A. SCHREINER, H. SCHRODER, A.J. SCHWARTZ, A.S. SCHWARZ, B. SCHWENNINGER, B. SCHWINGENHEUER, F. SCIACCA, N. SEMPRINI-CESARI, S. SHUVALOV, L. SILVA, K. SMIRNOV, L. SOZUER, S. SOLUNIN, A. SOMOV, S. SOMOV, J. SPENGLER, R. SPIGHI, A. SPIRIDONOV, A. STANOVNIK, M. STARIC, C. STEGMANN, H.S. SUBRAMANIA, M. SYMALLA, I. TIKHOMIROV, M. TITOV, I. TSAKOV, U. UWER, C. VAN ELDIK, YU. VASSILIEV, M. VILLA, A. VITALE, I. VUKOTIC, H. WAHLBERG, A.H. WALENTA, M. WALTER, J.J. WANG, D. WEGENER, U. WERTHENBACH, H. WOLTERS, R. WURTH, A. WURZ, YU. ZAITSEV, M. ZAVERTYAEV, G. ZECH, T. ZEUNER, A. ZHELEZOV, Z. ZHENG, R. ZIMMERMANN, T. ZIVKO, and A. ZOCCOLI

Abstract

We have searched for Theta^+(1540) and Xi^{--}(1862) pentaquark candidates in proton-induced reactions on C, Ti and W targets at mid-rapidity and sqrt{s} = 41.6 GeV. In 2x10^8 inelastic events we find no evidence for narrow (sigma~5 MeV) signals in the Theta^+ -> pK_s and Xi^{--} -> Xi^-pi^- channels; our 95% CL upper limits (UL) for the inclusive production cross section times branching fraction Bx(dsigma/dy)|_{y~0} are 3.7 and 2.5 microb/N. The UL of the yield ratio of [Theta^+ / Lambda(1520)] < 2.7% is significantly lower than model predictions. Our UL of [BxXi^{--} / Xi(1530)^0] < 4% is at variance with the results that have provided first evidence for the Xi^{--} signal.

Published
2004

12. Erratum to: V0 production in p+A collisions at $\sqrt{s}=41.6$ GeV

Author

H. Rick, T. Zeuner, A. Bogatyrev, V. Rybnikov, C. B. Krauss, T. Buran, I. Belotelov, H. Kapitza, I. Matchikhilian, M. Adams, H. Deppe, S. De Castro, H. S. Subramania, Y. Pylypchenko, Andrej Gorišek, A. Belkov, Laura Silva, I. Rostovtseva, J. Batista, M. Negodaev, T. Hott, D. Peralta, I. Vukotic, Imma Riu, P. Conde, Igor Golutvin, A. Schreiner, Peter Robmann, A. Michetti, Maurizio Piccinini, B. Lomonosov, R. Pestotnik, M. Medinnis, P. Križan, A. Golutvin, B. Bobchenko, I. Kisel, B. Lewendel, Yu. Zaitsev, R. Pernack, M. Bruinsma, Kendall Reeves, L. Sozuer, B. Schwenninger, M. Feuerstack-Raible, Mogens Dam, R. Mizuk, J. Spengler, Yu.T. Kiryushin, E. B. Klinkby, C. Bauer, S. Masciocchi, H. Albrecht, M. Starič, A. Somov, Wouter Hulsbergen, R. Mankel, I. Gorbounov, R. Wurth, D. Pose, F. Sanchez, Antonio Zoccoli, A. Gellrich, M. Danilov, S. Kupper, U. Schwanke, M. Funcke, J. Bastos, O. Igonkina, O. Gouchtchine, S. Shuvalov, S. Solunin, Maksym Titov, Y. Guilitsky, M. Poli, D. Reßing, A. J. Schwartz, Jose M Hernandez, G. Bohm, Mikhail Zavertyaev, A. Stanovnik, C. Stegmann, Hermann Kolanoski, K. Ehret, B. Giacobbe, I. Abt, N.N. Karpenko, A. Lanyov, J. Kessler, Antonio Sbrizzi, Valery Pugatch, S. Prystupa, T. Jagla, X. Dong, F. Sciacca, J. J. Wang, D. Goloubkov, A. S. Schwarz, M. zur Nedden, A. Zhelezov, A. Vitale, Kwong Lau, Mauro Villa, R. Muresan, H. B. Dreis, Vladimir Popov, M. Nörenberg, Nicola Semprini-Cesari, Samo Korpar, M. Bräuer, M. Walter, V. Egorytchev, M. Mevius, C. Cruse, U. Uwer, M. T. Nunez Pardo de Vera, M. Agari, Ulrich Werthenbach, Vasco Amaral, I. Massa, Th. S. Bauer, António Amorim, M. Böcker, I. Tsakov, I. Tikhomirov, J.D. Hansen, O. Barsukova, Thomas Lohse, Marco Bruschi, M. A. Pleier, H. Schröder, K. T. Knöpfle, A. H. Walenta, Helmut Wolters, B. Fominykh, Yu.V. Mikhailov, Farid Ould-Saada, D. C. Goulart, Werner Hofmann, T. Živko, S. Essenov, S. Keller, Marcus Hohlmann, U. Husemann, R. Zimmermann, P. Kreuzer, G. Medin, F. Khasanov, D. Krücker, Yu. A. Golubkov, K. M. Danielsen, Reinhard Männer, A. Bertin, B. Schmidt, M. Ispiryan, S. Gradl, R. Spighi, S. J. Aplin, B. Schwingenheuer, Vladislav Balagura, J. Pyrlik, Y. Vassiliev, Alexander Spiridonov, João Carvalho, S. Karabekyan, Sebastian Nowak, D. Wegener, H. Wahlberg, W. Gradl, C. van Eldik, B. A. Petersen, Pietro Faccioli, V. Aushev, F. Grimaldi, C. Jiang, M. Bargiotti, Laura Fabbri, J. Groth-Jensen, C. Padilla, A. Wurz, F. Eisele, J. Gläß, Dmitry Emeliyanov, Z. Zheng, S. Xella-Hansen, M. Symalla, Peter Buchholz, Y. Bagaturia, M. Schmelling, Ll. Garrido, J. Flammer, T. Kvaratskheliia, S. Somov, Aleksandar Aleksandrov, and M. Ouchrif

Subjects
Physics, Nuclear physics, Physics and Astronomy (miscellaneous), Production (economics), Statistical physics, Engineering (miscellaneous)
Full Text
View/download PDF

13. Limits for the central production of Theta+ and Xi(--)pentaquarks in 920-GeV pA collisions.

Author

Abt I, Adams M, Agari M, Albrecht H, Aleksandrov A, Amaral V, Amorim A, Aplin SJ, Aushev V, Bagaturia Y, Balagura V, Bargiotti M, Barsukova O, Bastos J, Batista J, Bauer C, Bauer TS, Belkov A, Belkov A, Belotelov I, Bertin A, Bobchenko B, Böcker M, Bogatyrev A, Bohm G, Bräuer M, Bruinsma M, Bruschi M, Buchholz P, Buran T, Carvalho J, Conde P, Cruse C, Dam M, Danielsen KM, Danilov M, Castro SD, Deppe H, Dong X, Dreis HB, Egorytchev V, Ehret K, Eisele F, Emeliyanov D, Essenov S, Fabbri L, Faccioli P, Feuerstack-Raible M, Flammer J, Fominykh B, Funcke M, Garrido L, Giacobbe B, Gläss J, Goloubkov D, Golubkov Y, Golutvin A, Golutvin I, Gorbounov I, Gorisek A, Gouchtchine O, Goulart DC, Gradl S, Gradl W, Grimaldi F, Groth-Jensen J, Guilitsky Y, Hansen JD, Hernández JM, Hofmann W, Hott T, Hulsbergen W, Husemann U, Igonkina O, Ispiryan M, Jagla T, Jiang C, Kapitza H, Karabekyan S, Karpenko N, Keller S, Kessler J, Khasanov F, Kiryushin Y, Klinkby E, Knöpfle KT, Kolanoski H, Korpar S, Krauss C, Kreuzer P, Krizan P, Krücker D, Kupper S, Kvaratskheliia T, Lanyov A, Lau K, Lewendel B, Lohse T, Lomonosov B, Männer R, Masciocchi S, Massa I, Matchikhilian I, Medin G, Medinnis M, Mevius M, Michetti A, Mikhailov Y, Mizuk R, Muresan R, Zur Nedden M, Negodaev M, Nörenberg M, Nowak S, Núñez Pardo de Vera MT, Ouchrif M, Ould-Saada F, Padilla C, Peralta D, Pernack R, Pestotnik R, Piccinini M, Pleier MA, Poli M, Popov V, Pose A, Pose D, Prystupa S, Pugatch V, Pylypchenko Y, Pyrlik J, Reeves K, Ressing D, Rick H, Riu I, Robmann P, Rostovtseva I, Rybnikov V, Sánchez F, Sbrizzi A, Schmelling M, Schmidt B, Schreiner A, Schröder H, Schwartz AJ, Schwarz AS, Schwenninger B, Schwingenheuer B, Sciacca F, Semprini-Cesari N, Shuvalov S, Silva L, Smirnov K, Sözüer L, Solunin S, Somov A, Somov S, Spengler J, Spighi R, Spiridonov A, Stanovnik A, Staric M, Stegmann C, Subramania HS, Symalla M, Tikhomirov I, Titov M, Tsakov I, Uwer U, van Eldik C, Vassiliev Y, Villa M, Vitale A, Vukotic I, Wahlberg H, Walenta AH, Walter M, Wang JJ, Wegener D, Werthenbach U, Wolters H, Wurth R, Wurz A, Zaitsev Y, Zavertyaev M, Zech G, Zeuner T, Zhelezov A, Zheng Z, Zimmermann R, Zivko T, and Zoccoli A

Abstract

We have searched for Theta+(1540) and Xi(--)(1862) pentaquark candidates in proton-induced reactions on C, Ti, and W targets at midrapidity and square root of s = 41.6 GeV. In 2 x 10(8) inelastic events we find no evidence for narrow (sigma approximately 5 MeV) signals in the Theta+ --> pK0(S) and Xi(--) --> Xi- pi- channels; our 95% C.L. upper limits (UL) for the inclusive production cross section times branching fraction B dsigma/dy/(y approximately 0) are (4-16) mub/N for a Theta+ mass between 1521 and 1555 MeV, and 2.5 mub/N for the Xi(--). The UL of the yield ratio of Theta+/Lambda(1520) < (3-12)% is significantly lower than model predictions. Our UL of B Xi(--)/Xi(1530)0 < 4% is at variance with the results that have provided the first evidence for the Xi(--).

Published
2004
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results