Measurement of J/psi photoproduction at large momentum transfer at HERA
ZEUS Collaboration
TL;DR
This study measures the production of J/psi mesons in high-energy photon-proton collisions at HERA, providing data to test perturbative QCD predictions at large momentum transfer.
Contribution
It presents the first detailed measurement of J/psi photoproduction at large momentum transfer, comparing results with theoretical QCD models.
Findings
Cross section varies with photon-proton energy and momentum transfer
Results agree with perturbative QCD calculations
Provides new data for understanding diffractive processes
Abstract
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.
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