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Abstract
The exclusive photoproduction reactions γp → J/ψ(1S)p and γp → ψ(2S)p have been measured at an ep centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 373 pb−1. The measurement was made in the kinematic range 30 < W < 180 GeV, Q2< 1 GeV2 and |t| < 1 GeV2, where W is the photon-proton centre-of-mass energy, Q2 is the photon virtuality and t is the squared four-momentum transfer at the proton vertex. The decay channels used were J/ψ(1S) → μ+μ−, ψ(2S) → μ+μ− and ψ(2S) → J/ψ(1S)π+π− with subsequent decay J/ψ(1S) → μ+μ−. The ratio of the production cross sections, R = σψ(2S)/σJ/ψ(1S), has been measured as a function of W and |t| and compared to previous data in photoproduction and deep inelastic scattering and with predictions of QCD-inspired models of exclusive vector-meson production, which are in reasonable agreement with the data.
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Details
Title
Measurement of the cross-section ratio σψ(2S)/σJ/ψ(1S) in exclusive photoproduction at HERA
Author
Abt, I. 1 ; Adamus, M. 2 ; Aggarwal, R. 3 ; Aushev, V. 4 ; Behnke, O. 5 ; Bertolin, A. 6 ; Bloch, I. 7 ; Brock, I. 8 ; Brook, N. H. 9 ; Brugnera, R. 10 ; Bruni, A. 11 ; Bussey, P. J. 12 ; Caldwell, A. 1 ; Catterall, C. D. 13 ; Chwastowski, J. 14 ; Ciborowski, J. 15 ; Ciesielski, R. 16 ; Cooper-Sarkar, A. M. 17 ; Corradi, M. 18 ; Dementiev, R. K.; Dusini, S. 6 ; Ferrando, J. 5 ; Foster, B. 19 ; Gallo, E. 20 ; Gangadharan, D. 21 ; Garfagnini, A. 10 ; Geiser, A. 5 ; Grzelak, G. 22 ; Gwenlan, C. 17 ; Hochman, D. 23 ; Jomhari, N. Z. 5 ; Kadenko, I. 4 ; Karshon, U. 23 ; Kaur, P. 24 ; Klanner, R. 25 ; Klein, U. 26 ; Korzhavina, I. A.; Kovalchuk, N. 25 ; Kuze, M. 27 ; Levchenko, B. B.; Levy, A. 28 ; Löhr, B. 5 ; Lohrmann, E. 25 ; Longhin, A. 10 ; Lorkowski, F. 5 ; Makarenko, I. 5 ; Malka, J. 29 ; Masciocchi, S. 30 ; Nagano, K. 31 ; Nam, J. D. 32 ; Onishchuk, Yu. 4 ; Paul, E. 8 ; Pidhurskyi, I. 33 ; Polini, A. 11 ; Przybycień, M. 34 ; Quintero, A. 32 ; Rubinsky, I. 5 ; Ruspa, M. 35 ; Schneekloth, U. 5 ; Schörner-Sadenius, T. 5 ; Selyuzhenkov, I. 36 ; Shchedrolosiev, M. 5 ; Shcheglova, L. M.; Skillicorn, I. O. 12 ; Słomiński, W. 37 ; Solano, A. 38 ; Stanco, L. 6 ; Stefaniuk, N. 5 ; Surrow, B. 32 ; Tokushuku, K. 31 ; Tomaszewska, J. 39 ; Trofymov, A. 40 ; Turkot, O. 29 ; Tymieniecka, T. 2 ; Verbytskyi, A. 1 ; Wan Abdullah, W. A. T. 41 ; Wichmann, K. 5 ; Wing, M. 42 ; Yamada, S. 31 ; Yamazaki, Y. 43 ; Żarnecki, A. F. 22 ; Zenaiev, O. 44
1 Max-Planck-Institut für Physik, München, Germany (GRID:grid.435824.c) (ISNI:0000 0001 2375 0603)
2 National Centre for Nuclear Research, Warsaw, Poland (GRID:grid.450295.f) (ISNI:0000 0001 0941 0848)
3 DST-Inspire Faculty, Department of Technology, SPPU, Pune, India (GRID:grid.450295.f)
4 Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine (GRID:grid.34555.32) (ISNI:0000 0004 0385 8248)
5 Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453)
6 INFN Padova, Padova, Italy (GRID:grid.470212.2)
7 Deutsches Elektronen-Synchrotron DESY, Zeuthen, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453)
8 Physikalisches Institut der Universität Bonn, Bonn, Germany (GRID:grid.10388.32) (ISNI:0000 0001 2240 3300)
9 University College London, Physics and Astronomy Department, London, United Kingdom (GRID:grid.83440.3b) (ISNI:0000000121901201); University of Bath, Bath, United Kingdom (GRID:grid.7340.0) (ISNI:0000 0001 2162 1699)
10 Dipartimento di Fisica e Astronomia dell’ Università and INFN, Padova, Italy (GRID:grid.470212.2)
11 INFN Bologna, Bologna, Italy (GRID:grid.470193.8) (ISNI:0000 0004 8343 7610)
12 University of Glasgow, School of Physics and Astronomy, Glasgow, United Kingdom (GRID:grid.8756.c) (ISNI:0000 0001 2193 314X)
13 York University, Department of Physics, Toronto, Canada (GRID:grid.21100.32) (ISNI:0000 0004 1936 9430)
14 Polish Academy of Sciences, The Henryk Niewodniczanski Institute of Nuclear Physics, Krakow, Poland (GRID:grid.413454.3) (ISNI:0000 0001 1958 0162)
15 University of Warsaw, Faculty of Physics, Warsaw, Poland (GRID:grid.12847.38) (ISNI:0000 0004 1937 1290); Lodz University, Lodz, Poland (GRID:grid.10789.37) (ISNI:0000 0000 9730 2769)
16 Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453); Rockefeller University, New York, USA (GRID:grid.134907.8) (ISNI:0000 0001 2166 1519)
17 University of Oxford, Department of Physics, Oxford, United Kingdom (GRID:grid.4991.5) (ISNI:0000 0004 1936 8948)
18 INFN Bologna, Bologna, Italy (GRID:grid.470193.8) (ISNI:0000 0004 8343 7610); INFN Roma, Rome, Italy (GRID:grid.6045.7) (ISNI:0000 0004 1757 5281)
19 University of Oxford, Department of Physics, Oxford, United Kingdom (GRID:grid.4991.5) (ISNI:0000 0004 1936 8948); DESY and University of Hamburg, Hamburg, Germany (GRID:grid.9026.d) (ISNI:0000 0001 2287 2617)
20 Institute of Experimental Physics, Hamburg University, Hamburg, Germany (GRID:grid.9026.d) (ISNI:0000 0001 2287 2617); DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453)
21 Physikalisches Institut of the University of Heidelberg, Heidelberg, Germany (GRID:grid.7700.0) (ISNI:0000 0001 2190 4373); University of Houston, Houston, USA (GRID:grid.266436.3) (ISNI:0000 0004 1569 9707)
22 University of Warsaw, Faculty of Physics, Warsaw, Poland (GRID:grid.12847.38) (ISNI:0000 0004 1937 1290)
23 Weizmann Institute, Department of Particle Physics and Astrophysics, Rehovot, Israel (GRID:grid.13992.30) (ISNI:0000 0004 0604 7563)
24 Sant Longowal Institute of Engineering and Technology, Longowal, India (GRID:grid.444561.6) (ISNI:0000 0004 0504 3907)
25 Institute of Experimental Physics, Hamburg University, Hamburg, Germany (GRID:grid.9026.d) (ISNI:0000 0001 2287 2617)
26 Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453); University of Liverpool, Liverpool, United Kingdom (GRID:grid.10025.36) (ISNI:0000 0004 1936 8470)
27 Tokyo Institute of Technology, Department of Physics, Tokyo, Japan (GRID:grid.32197.3e) (ISNI:0000 0001 2179 2105)
28 Tel Aviv University, Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv, Israel (GRID:grid.12136.37) (ISNI:0000 0004 1937 0546)
29 Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453); European X-ray Free-Electron Laser facility GmbH, Hamburg, Germany (GRID:grid.434729.f) (ISNI:0000 0004 0590 2900)
30 Physikalisches Institut of the University of Heidelberg, Heidelberg, Germany (GRID:grid.7700.0) (ISNI:0000 0001 2190 4373); GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany (GRID:grid.159791.2) (ISNI:0000 0000 9127 4365)
31 Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan (GRID:grid.410794.f) (ISNI:0000 0001 2155 959X)
32 Temple University, Department of Physics, Philadelphia, USA (GRID:grid.264727.2) (ISNI:0000 0001 2248 3398)
33 Goethe Universität, Institut für Kernphysik, Frankfurt am Main, Germany (GRID:grid.7839.5) (ISNI:0000 0004 1936 9721)
34 AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland (GRID:grid.9922.0) (ISNI:0000 0000 9174 1488)
35 Università del Piemonte Orientale, Novara, and INFN, Torino, Italy (GRID:grid.470222.1) (ISNI:0000 0004 7471 9712)
36 GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany (GRID:grid.159791.2) (ISNI:0000 0000 9127 4365)
37 Jagellonian University, Department of Physics, Krakow, Poland (GRID:grid.5522.0) (ISNI:0000 0001 2162 9631)
38 Università di Torino and INFN, Torino, Italy (GRID:grid.7605.4) (ISNI:0000 0001 2336 6580)
39 University of Warsaw, Faculty of Physics, Warsaw, Poland (GRID:grid.12847.38) (ISNI:0000 0004 1937 1290); Polish Air Force Academy, Deblin, Poland (GRID:grid.460650.1) (ISNI:0000 0004 0566 8712)
40 Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine (GRID:grid.34555.32) (ISNI:0000 0004 0385 8248); Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453)
41 Universiti Malaya, National Centre for Particle Physics, Kuala Lumpur, Malaysia (GRID:grid.10347.31) (ISNI:0000 0001 2308 5949)
42 University College London, Physics and Astronomy Department, London, United Kingdom (GRID:grid.83440.3b) (ISNI:0000000121901201)
43 Kobe University, Department of Physics, Kobe, Japan (GRID:grid.31432.37) (ISNI:0000 0001 1092 3077)
44 Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453); CERN, Geneva, Switzerland (GRID:grid.9132.9) (ISNI:0000 0001 2156 142X)
1 Max-Planck-Institut für Physik, München, Germany (GRID:grid.435824.c) (ISNI:0000 0001 2375 0603)
2 National Centre for Nuclear Research, Warsaw, Poland (GRID:grid.450295.f) (ISNI:0000 0001 0941 0848)
3 DST-Inspire Faculty, Department of Technology, SPPU, Pune, India (GRID:grid.450295.f)
4 Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine (GRID:grid.34555.32) (ISNI:0000 0004 0385 8248)
5 Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453)
6 INFN Padova, Padova, Italy (GRID:grid.470212.2)
7 Deutsches Elektronen-Synchrotron DESY, Zeuthen, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453)
8 Physikalisches Institut der Universität Bonn, Bonn, Germany (GRID:grid.10388.32) (ISNI:0000 0001 2240 3300)
9 University College London, Physics and Astronomy Department, London, United Kingdom (GRID:grid.83440.3b) (ISNI:0000000121901201); University of Bath, Bath, United Kingdom (GRID:grid.7340.0) (ISNI:0000 0001 2162 1699)
10 Dipartimento di Fisica e Astronomia dell’ Università and INFN, Padova, Italy (GRID:grid.470212.2)
11 INFN Bologna, Bologna, Italy (GRID:grid.470193.8) (ISNI:0000 0004 8343 7610)
12 University of Glasgow, School of Physics and Astronomy, Glasgow, United Kingdom (GRID:grid.8756.c) (ISNI:0000 0001 2193 314X)
13 York University, Department of Physics, Toronto, Canada (GRID:grid.21100.32) (ISNI:0000 0004 1936 9430)
14 Polish Academy of Sciences, The Henryk Niewodniczanski Institute of Nuclear Physics, Krakow, Poland (GRID:grid.413454.3) (ISNI:0000 0001 1958 0162)
15 University of Warsaw, Faculty of Physics, Warsaw, Poland (GRID:grid.12847.38) (ISNI:0000 0004 1937 1290); Lodz University, Lodz, Poland (GRID:grid.10789.37) (ISNI:0000 0000 9730 2769)
16 Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453); Rockefeller University, New York, USA (GRID:grid.134907.8) (ISNI:0000 0001 2166 1519)
17 University of Oxford, Department of Physics, Oxford, United Kingdom (GRID:grid.4991.5) (ISNI:0000 0004 1936 8948)
18 INFN Bologna, Bologna, Italy (GRID:grid.470193.8) (ISNI:0000 0004 8343 7610); INFN Roma, Rome, Italy (GRID:grid.6045.7) (ISNI:0000 0004 1757 5281)
19 University of Oxford, Department of Physics, Oxford, United Kingdom (GRID:grid.4991.5) (ISNI:0000 0004 1936 8948); DESY and University of Hamburg, Hamburg, Germany (GRID:grid.9026.d) (ISNI:0000 0001 2287 2617)
20 Institute of Experimental Physics, Hamburg University, Hamburg, Germany (GRID:grid.9026.d) (ISNI:0000 0001 2287 2617); DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453)
21 Physikalisches Institut of the University of Heidelberg, Heidelberg, Germany (GRID:grid.7700.0) (ISNI:0000 0001 2190 4373); University of Houston, Houston, USA (GRID:grid.266436.3) (ISNI:0000 0004 1569 9707)
22 University of Warsaw, Faculty of Physics, Warsaw, Poland (GRID:grid.12847.38) (ISNI:0000 0004 1937 1290)
23 Weizmann Institute, Department of Particle Physics and Astrophysics, Rehovot, Israel (GRID:grid.13992.30) (ISNI:0000 0004 0604 7563)
24 Sant Longowal Institute of Engineering and Technology, Longowal, India (GRID:grid.444561.6) (ISNI:0000 0004 0504 3907)
25 Institute of Experimental Physics, Hamburg University, Hamburg, Germany (GRID:grid.9026.d) (ISNI:0000 0001 2287 2617)
26 Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453); University of Liverpool, Liverpool, United Kingdom (GRID:grid.10025.36) (ISNI:0000 0004 1936 8470)
27 Tokyo Institute of Technology, Department of Physics, Tokyo, Japan (GRID:grid.32197.3e) (ISNI:0000 0001 2179 2105)
28 Tel Aviv University, Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv, Israel (GRID:grid.12136.37) (ISNI:0000 0004 1937 0546)
29 Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453); European X-ray Free-Electron Laser facility GmbH, Hamburg, Germany (GRID:grid.434729.f) (ISNI:0000 0004 0590 2900)
30 Physikalisches Institut of the University of Heidelberg, Heidelberg, Germany (GRID:grid.7700.0) (ISNI:0000 0001 2190 4373); GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany (GRID:grid.159791.2) (ISNI:0000 0000 9127 4365)
31 Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan (GRID:grid.410794.f) (ISNI:0000 0001 2155 959X)
32 Temple University, Department of Physics, Philadelphia, USA (GRID:grid.264727.2) (ISNI:0000 0001 2248 3398)
33 Goethe Universität, Institut für Kernphysik, Frankfurt am Main, Germany (GRID:grid.7839.5) (ISNI:0000 0004 1936 9721)
34 AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland (GRID:grid.9922.0) (ISNI:0000 0000 9174 1488)
35 Università del Piemonte Orientale, Novara, and INFN, Torino, Italy (GRID:grid.470222.1) (ISNI:0000 0004 7471 9712)
36 GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany (GRID:grid.159791.2) (ISNI:0000 0000 9127 4365)
37 Jagellonian University, Department of Physics, Krakow, Poland (GRID:grid.5522.0) (ISNI:0000 0001 2162 9631)
38 Università di Torino and INFN, Torino, Italy (GRID:grid.7605.4) (ISNI:0000 0001 2336 6580)
39 University of Warsaw, Faculty of Physics, Warsaw, Poland (GRID:grid.12847.38) (ISNI:0000 0004 1937 1290); Polish Air Force Academy, Deblin, Poland (GRID:grid.460650.1) (ISNI:0000 0004 0566 8712)
40 Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine (GRID:grid.34555.32) (ISNI:0000 0004 0385 8248); Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453)
41 Universiti Malaya, National Centre for Particle Physics, Kuala Lumpur, Malaysia (GRID:grid.10347.31) (ISNI:0000 0001 2308 5949)
42 University College London, Physics and Astronomy Department, London, United Kingdom (GRID:grid.83440.3b) (ISNI:0000000121901201)
43 Kobe University, Department of Physics, Kobe, Japan (GRID:grid.31432.37) (ISNI:0000 0001 1092 3077)
44 Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453); CERN, Geneva, Switzerland (GRID:grid.9132.9) (ISNI:0000 0001 2156 142X)
Pages
164
Publication year
2022
Publication date
Dec 2022
e-ISSN
10298479
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2759442489
Copyright
© The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.