(en) The proton-dissociative diffractive photoproduction of J/psi mesons has been studied in ep collisions with the ZEUS detector at HERA using an integrated luminosity of 112 pb^-1. The cross section is presented as a function of the photon-proton centre-of-mass energy and of the squared four-momentum transfer at the proton vertex. The results are compared to perturbative QCD calculations. Comment: 38 pages, 11 figures
Piotrzkowski, K., Chekanov, S., de Favereau, J., & et al. (2009). Measurement of J/psi photoproduction at large momentum transfer at HERA. arXiv. https://hdl.handle.net/2078.5/257483