Diffractive J/ψ Photoproduction as a Probe of the Gluon Density

Nota de FísicaPublicado

Diffractive $J/\psi$ Photoproduction as a Probe of the Gluon Density

M. G. Ryskin; R. G. Roberts; A. D. Martin; E.M. Levin

1995

Autores: M. G. Ryskin; R. G. Roberts; A. D. Martin; E.M. Levin
Tipo: Nota de Física
Status: Publicado
Data de publicação: 1995
Descrição: We use perturbative QCD, beyond the leading <math>\ln Q^2\!\,</math> approximation, to show how measurements of diffractive <math>J/\psi\!\,</math> 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 c within the <math>J/\psi\!\,</math> and of the rescattering of the cc quark pair on the proton. We find that the available data for diffractive <math>J/\psi\!\,</math> photoproduction can discriminate between the gluon distributions of the most recent sets of partons.
Ano: 1995
Número: CBPF-NF-079/95
Vínculo com tese: Não
Vínculo com bolsa: Não