Diffractive J/ψ photoproduction as a probe of the gluon density

M. G. Ryskin*, R. G. Roberts, A. D. Martin, E. M. Levin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

119 Scopus citations


We use perturbative QCD, beyond the leading ln Q2 approximation, to show how measurements of diffractive J/ψ production at HERA can provide a sensitive probe of the gluon density of the proton at small values of Bjorken x. We estimate both the effect of the relativistic motion of the c and c̄ within the J/ψ and of the rescattering of the cc̄ quark pair on the proton. We find that the available data for diffractive J/ψ photoproduction can discriminate between the gluon distributions of the most recent sets of partons.

Original languageEnglish
Pages (from-to)231-239
Number of pages9
JournalZeitschrift fur Physik C-Particles and Fields
Issue number2
StatePublished - Oct 1997


FundersFunder number
Royal Society
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Particle Physics and Astronomy Research Council


    Dive into the research topics of 'Diffractive J/ψ photoproduction as a probe of the gluon density'. Together they form a unique fingerprint.

    Cite this