Photoproduction of J/ψ with and without proton dissociation

We use a k T -factorization approach, to calculate the amplitude for the diffractive γ p → Vp processes, where V is a J/ψ or ψ(2S) vector meson. Using these amplitudes, we evaluate the cross section for exclusive photoproduction of J/ψ, ψ(2S) mesons in proton-proton collisions. We compare our result...

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Bibliographic Details
Main Authors: Schäfer, Wolfgang, Cisek, Anna, Szczurek, Antoni
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:We use a k T -factorization approach, to calculate the amplitude for the diffractive γ p → Vp processes, where V is a J/ψ or ψ(2S) vector meson. Using these amplitudes, we evaluate the cross section for exclusive photoproduction of J/ψ, ψ(2S) mesons in proton-proton collisions. We compare our results to LHCb data for a variety of unintegrated gluon distributions of the proton. We then turn to the related diffractive production in proton dissociative events. In this talk we concentrated on electromagnetic dissociation, which is calculable without additional free parameters. Dissociative events constitute an important experimental background to exclusive production.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4977148