Authors

H. Abramowicz, Tel Aviv University
I. Abt, Max Planck Institute for Physics (Werner Heisenberg Institute)
L. Adamczyk, AGH University of Science and Technology
M. Adamus, National Centre for Nuclear Research (NCBJ)
R. Aggarwal, Panjab University
S. Antonelli, Alma Mater Studiorum Università di Bologna
P. Antonioli, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
A. Antonov, National Research Nuclear University MEPhI
M. Arneodo, Università degli Studi del Piemonte Orientale "Amedeo Avogadro"
O. Arslan, Universität Bonn
V. Aushev, Institute of Nuclear Research, National Academy of Sciences in Ukraine
Y. Aushev, Taras Shevchenko National University of Kyiv
O. Bachynska, Deutsches Elektronen-Synchrotron (DESY)
A. Bamberger, Universität Freiburg im Breisgau
A. N. Barakbaev, Ministry of Education and Science of the Republic of Kazakhstan
G. Barbagli, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
G. Bari, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
F. Barreiro, Universidad Autónoma de Madrid
N. Bartosik, Deutsches Elektronen-Synchrotron (DESY)
D. Bartsch, Universität Bonn
M. Basile, Alma Mater Studiorum Università di Bologna
O. Behnke, Deutsches Elektronen-Synchrotron (DESY)
J. Behr, Deutsches Elektronen-Synchrotron (DESY)
U. Behrens, Deutsches Elektronen-Synchrotron (DESY)
L. Bellagamba, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
A. Bertolin, Istituto Nazionale Di Fisica Nucleare, Sezione di Padova
S. Bhadra, York University
M. Bindi, Alma Mater Studiorum Università di Bologna
C. Blohm, Deutsches Elektronen-Synchrotron (DESY)
V. Bokhonov, Institute of Nuclear Research, National Academy of Sciences in Ukraine
T. Bołd, AGH University of Science and Technology
Margarita C. K. Mattingly, Andrews UniversityFollow

Document Type

Article

Publication Date

8-27-2013

Keywords

Lepton-Nucleon Scattering, QCD

Abstract

The cross sections for inelastic photoproduction of J/ψ and ψ′ mesons have been measured in ep collisions with the ZEUS detector at HERA, using an integrated luminosity of 468 pb-1 collected in the period 1996-2007. The ψ′ to J/ψ cross section ratio was measured in the range 0.55 < z < 0.9 and 60 < W < 190 GeV as a function of W, z and pT. Here W denotes the photon-proton centre-of-mass energy, z is the fraction of the incident photon energy carried by the meson and p T is the transverse momentum of the meson with respect to the beam axis. The J/ψ cross sections were measured for 0.1 < z < 0.9, 60 < W < 240 GeV and pT > 1 GeV. Theoretical predictions within the non-relativistic QCD framework including NLO colour-singlet and colour-octet contributions were compared to the data, as were predictions based on the k T-factorisation approach. © 2013 SISSA.

Journal Title

Journal of High Energy Physics

Volume

2013

Issue

2

First Page

1

Last Page

30

DOI

10.1007/JHEP02(2013)071

First Department

Physics

Acknowledgements

Retrieved January 29, 2021 from https://link.springer.com/article/10.1007/JHEP02(2013)071

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