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Proceedings of XXI International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS 2013)

DOI: 10.22323/1.191.0173

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Measurement of inelastic J/psi and psi ' photoproduction at HERA

Journal article published in 2013 by H. Abramowicz, J. del Peso, A. F. Żarnecki, N. Brummer, S. Bhadra, M. Bindi, N. Brümmer, C. Blohm, V. Bokhonov, T. Bold, K. Bondarenko ORCID, N. Bruemmer, Eg G. Boos, K. Borras, D. Boscherini and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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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 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.