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Abstract
Measurements of the kinematic distributions of J/ψ 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<xF<0.14 and for transverse momentum up to pT=5.4 GeV/c are presented. The xF and pT dependencies of the nuclear suppression parameter, α, are also given. The results are based on 2.4×105J/ψ mesons reconstructed in both the e+e− and μ+μ− 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 xF for the first time. The average value of α in the measured xF region is 0.981±0.015. The data suggest that the strong nuclear suppression of J/ψ production previously observed at high xF turns into an enhancement at negative xF.
Details
Title
Kinematic distributions and nuclear effects of J/ψ production in 920 GeV fixed-target proton-nucleus collisions
Author
Abt, I 1 ; Adams, M 2 ; Agari, M 3 ; Albrecht, H 4 ; Aleksandrov, A 5 ; Amaral, V 6 ; Amorim, A 6 ; Aplin, S J 4 ; Aushev, V 7 ; Bagaturia, Y 4 ; Balagura, V 8 ; Bargiotti, M 9 ; Barsukova, O 10 ; Bastos, J 6 ; Batista, J 6 ; Bauer, C 3 ; Bauer, Th S 11 ; Belkov, A 10 ; Belkov, Ar 10 ; Belotelov, I 10 ; Bertin, A 9 ; Bobchenko, B 8 ; Böcker, M 12 ; Bogatyrev, A 8 ; Bohm, G 5 ; Bräuer, M 3 ; Bruinsma, M 13 ; Bruschi, M 9 ; Buchholz, P 12 ; Buran, T 14 ; Carvalho, J 6 ; Conde, P 15 ; Cruse, C 2 ; Dam, M 16 ; Danielsen, K M 14 ; Danilov, M 8 ; De Castro, S 9 ; Deppe, H 17 ; Dong, X 18 ; Dreis, H B 17 ; Egorytchev, V 4 ; Ehret, K 2 ; Eisele, F 17 ; Emeliyanov, D 4 ; Essenov, S 8 ; Fabbri, L 9 ; Faccioli, P 9 ; Feuerstack-Raible, M 17 ; Flammer, J 4 ; Fominykh, B 8 ; Funcke, M 2 ; Garrido, Ll 19 ; Gellrich, A 5 ; Giacobbe, B 9 ; Gläß, J 20 ; Goloubkov, D 4 ; Golubkov, Y 4 ; Golutvin, A 8 ; Golutvin, I 10 ; Gorbounov, I 21 ; Gorišek, A 22 ; Gouchtchine, O 8 ; Goulart, D C 23 ; Gradl, S 17 ; Gradl, W 17 ; Grimaldi, F 9 ; Groth-Jensen, J 16 ; Yu Guilitsky 8 ; Hansen, J D 16 ; Hernández, J M 5 ; Hofmann, W 3 ; Hohlmann, M 4 ; Hott, T 17 ; Hulsbergen, W 11 ; Husemann, U 12 ; Igonkina, O 8 ; Ispiryan, M 24 ; Jagla, T 3 ; Jiang, C 18 ; Kapitza, H 25 ; Karabekyan, S 26 ; Karpenko, N 10 ; Keller, S 12 ; Kessler, J 17 ; Khasanov, F 8 ; Yu Kiryushin 10 ; Kisel, I 1 ; Klinkby, E 16 ; Knöpfle, K T 3 ; Kolanoski, H 27 ; Korpar, S 28 ; Krauss, C 17 ; Kreuzer, P 29 ; Križan, P 30 ; Krücker, D 27 ; Kupper, S 22 ; Kvaratskheliia, T 8 ; Lanyov, A 10 ; Lau, K 24 ; Lewendel, B 4 ; Lohse, T 27 ; Lomonosov, B 4 ; Männer, R 20 ; Mankel, R 5 ; Masciocchi, S 4 ; Massa, I 9 ; Matchikhilian, I 8 ; Medin, G 27 ; Medinnis, M 4 ; Mevius, M 4 ; Michetti, A 4 ; Mikhailov, Yu 8 ; Mizuk, R 8 ; Muresan, R 16 ; zur Nedden, M 27 ; Negodaev, M 4 ; Nörenberg, M 4 ; Nowak, S 5 ; M T Núñez Pardo de Vera 4 ; Ouchrif, M 13 ; Ould-Saada, F 14 ; Padilla, C 4 ; Peralta, D 19 ; Pernack, R 26 ; Pestotnik, R 22 ; B AA Petersen 16 ; Piccinini, M 9 ; Pleier, M A 3 ; Poli, M 9 ; Popov, V 8 ; Pose, D 31 ; Prystupa, S 7 ; Pugatch, V 7 ; Pylypchenko, Y 14 ; Pyrlik, J 24 ; Reeves, K 3 ; Reßing, D 4 ; Rick, H 17 ; Riu, I 4 ; Robmann, P 32 ; Rostovtseva, I 8 ; Rybnikov, V 4 ; Sánchez, F 3 ; Sbrizzi, A 11 ; Schmelling, M 3 ; Schmidt, B 4 ; Schreiner, A 5 ; Schröder, H 26 ; Schwanke, U 5 ; Schwartz, A J 23 ; Schwarz, A S 4 ; Schwenninger, B 2 ; Schwingenheuer, B 3 ; Sciacca, F 3 ; Semprini-Cesari, N 9 ; Shuvalov, S 33 ; Silva, L 6 ; Sözüer, L 4 ; Solunin, S 10 ; Somov, A 4 ; Somov, S 4 ; Spengler, J 4 ; Spighi, R 9 ; Spiridonov, A 34 ; Stanovnik, A 30 ; Starič, M 22 ; Stegmann, C 27 ; Subramania, H S 24 ; Symalla, M 25 ; Tikhomirov, I 8 ; Titov, M 8 ; Tsakov, I 35 ; Uwer, U 17 ; C van Eldik 25 ; Vassiliev, Yu 7 ; Villa, M 9 ; Vitale, A 9 ; Vukotic, I 36 ; Wahlberg, H 37 ; Walenta, A H 12 ; Walter, M 5 ; Wang, J J 38 ; Wegener, D 2 ; Werthenbach, U 12 ; Wolters, H 6 ; Wurth, R 4 ; Wurz, A 20 ; Xella-Hansen, S 16 ; Zaitsev, Yu 8 ; Zavertyaev, M 39 ; Zeuner, T 21 ; Zhelezov, A 8 ; Zheng, Z 18 ; Zimmermann, R 26 ; Živko, T 22 ; Zoccoli, A 9
1 Max-Planck-Institut für Physik, Werner-Heisenberg-Institut, München, Germany
2 Institut für Physik, Universität Dortmund, Dortmund, Germany
3 Max-Planck-Institut für Kernphysik, Heidelberg, Germany
4 DESY, Hamburg, Germany
5 DESY, Zeuthen, Germany
6 LIP Coimbra, Coimbra, Portugal
7 Institute for Nuclear Research, Ukrainian Academy of Science, Kiev, Ukraine
8 Institute of Theoretical and Experimental Physics, Moscow, Russia
9 Dipartimento di Fisica dell’ Università di Bologna and INFN Sezione di Bologna, Bologna, Italy
10 Joint Institute for Nuclear Research Dubna, Dubna, Moscow region, Russia
11 NIKHEF, Amsterdam, The Netherlands
12 Fachbereich Physik, Universität Siegen, Siegen, Germany
13 NIKHEF, Amsterdam, The Netherlands; Universiteit Utrecht/NIKHEF, Utrecht, The Netherlands
14 Dept. of Physics, University of Oslo, Oslo, Norway
15 DESY, Hamburg, Germany; Department ECM, Faculty of Physics, University of Barcelona, Barcelona, Spain
16 Niels Bohr Institutet, Copenhagen, Denmark
17 Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany
18 Institute for High Energy Physics, Beijing, People’s Republic of China
19 Department ECM, Faculty of Physics, University of Barcelona, Barcelona, Spain
20 Lehrstuhl für Informatik V, Universität Mannheim, Mannheim, Germany
21 DESY, Hamburg, Germany; Fachbereich Physik, Universität Siegen, Siegen, Germany
22 J. Stefan Institute, Ljubljana, Slovenia
23 Department of Physics, University of Cincinnati, Cincinnati, OH, USA
24 Department of Physics, University of Houston, Houston, TX, USA
25 Institut für Physik, Universität Dortmund, Dortmund, Germany; DESY, Hamburg, Germany
26 Fachbereich Physik, Universität Rostock, Rostock, Germany
27 Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany
28 J. Stefan Institute, Ljubljana, Slovenia; University of Maribor, Maribor, Slovenia
29 DESY, Hamburg, Germany; University of California, Los Angeles, CA, USA
30 J. Stefan Institute, Ljubljana, Slovenia; University of Ljubljana, Ljubljana, Slovenia
31 Joint Institute for Nuclear Research Dubna, Dubna, Moscow region, Russia; Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany
32 Physik-Institut, Universität Zürich, Zürich, Switzerland
33 Institute of Theoretical and Experimental Physics, Moscow, Russia; Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany
34 Institute of Theoretical and Experimental Physics, Moscow, Russia; DESY, Zeuthen, Germany
35 Institute for Nuclear Research, INRNE-BAS, Sofia, Bulgaria
36 DESY, Zeuthen, Germany; Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany
37 Universiteit Utrecht/NIKHEF, Utrecht, The Netherlands
38 Institute of Engineering Physics, Tsinghua University, Beijing, People’s Republic of China
39 DESY, Hamburg, Germany; Max-Planck-Institut für Kernphysik, Heidelberg, Germany
1 Max-Planck-Institut für Physik, Werner-Heisenberg-Institut, München, Germany
2 Institut für Physik, Universität Dortmund, Dortmund, Germany
3 Max-Planck-Institut für Kernphysik, Heidelberg, Germany
4 DESY, Hamburg, Germany
5 DESY, Zeuthen, Germany
6 LIP Coimbra, Coimbra, Portugal
7 Institute for Nuclear Research, Ukrainian Academy of Science, Kiev, Ukraine
8 Institute of Theoretical and Experimental Physics, Moscow, Russia
9 Dipartimento di Fisica dell’ Università di Bologna and INFN Sezione di Bologna, Bologna, Italy
10 Joint Institute for Nuclear Research Dubna, Dubna, Moscow region, Russia
11 NIKHEF, Amsterdam, The Netherlands
12 Fachbereich Physik, Universität Siegen, Siegen, Germany
13 NIKHEF, Amsterdam, The Netherlands; Universiteit Utrecht/NIKHEF, Utrecht, The Netherlands
14 Dept. of Physics, University of Oslo, Oslo, Norway
15 DESY, Hamburg, Germany; Department ECM, Faculty of Physics, University of Barcelona, Barcelona, Spain
16 Niels Bohr Institutet, Copenhagen, Denmark
17 Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany
18 Institute for High Energy Physics, Beijing, People’s Republic of China
19 Department ECM, Faculty of Physics, University of Barcelona, Barcelona, Spain
20 Lehrstuhl für Informatik V, Universität Mannheim, Mannheim, Germany
21 DESY, Hamburg, Germany; Fachbereich Physik, Universität Siegen, Siegen, Germany
22 J. Stefan Institute, Ljubljana, Slovenia
23 Department of Physics, University of Cincinnati, Cincinnati, OH, USA
24 Department of Physics, University of Houston, Houston, TX, USA
25 Institut für Physik, Universität Dortmund, Dortmund, Germany; DESY, Hamburg, Germany
26 Fachbereich Physik, Universität Rostock, Rostock, Germany
27 Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany
28 J. Stefan Institute, Ljubljana, Slovenia; University of Maribor, Maribor, Slovenia
29 DESY, Hamburg, Germany; University of California, Los Angeles, CA, USA
30 J. Stefan Institute, Ljubljana, Slovenia; University of Ljubljana, Ljubljana, Slovenia
31 Joint Institute for Nuclear Research Dubna, Dubna, Moscow region, Russia; Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany
32 Physik-Institut, Universität Zürich, Zürich, Switzerland
33 Institute of Theoretical and Experimental Physics, Moscow, Russia; Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany
34 Institute of Theoretical and Experimental Physics, Moscow, Russia; DESY, Zeuthen, Germany
35 Institute for Nuclear Research, INRNE-BAS, Sofia, Bulgaria
36 DESY, Zeuthen, Germany; Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany
37 Universiteit Utrecht/NIKHEF, Utrecht, The Netherlands
38 Institute of Engineering Physics, Tsinghua University, Beijing, People’s Republic of China
39 DESY, Hamburg, Germany; Max-Planck-Institut für Kernphysik, Heidelberg, Germany
Pages
525-542
Publication year
2009
Publication date
Apr 2009
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2294085201
Copyright
The European Physical Journal C is a copyright of Springer, (2009). All Rights Reserved.