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

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dc.creatorRyskin, M. G.
dc.creatorRoberts, R. G.
dc.creatorMartin, A. D.
dc.creatorLevin, E. M.
dc.date1995-11-03
dc.date1996-02-23
dc.date.accessioned2026-07-07T09:00:43Z
dc.date.available2026-07-07T09:00:43Z
dc.descriptionWe use perturbative QCD, beyond the leading $\ln Q^2$ 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 $\overline{c}$ within the $J/ψ$ and of the rescattering of the $c\overline{c}$ 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.
dc.descriptionFormulas for Fermi motion are corrected. Numerical results are unchanged
dc.identifierhttps://arxiv.org/abs/hep-ph/9511228
dc.identifierhttp://arxiv.org/abs/hep-ph/9511228
dc.identifierZ.Phys. C76 (1997) 231-239
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/148087
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDiffractive $J/ψ$ photoproduction as a probe of the gluon density
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