The role of the quark and gluon GPDs in hard vector-meson electroproduction

Abstract

Electroproduction of light vector mesons is analyzed on the basis of handbag factorization. The required generalized parton distributions are constructed from the CTEQ6 parton distributions with the help of double distributions. The partonic subprocesses are calculated within the modified perturbative approach. The present work extends our previous analysis of the longitudinal cross section to the transverse one and other observables related to both the corresponding amplitudes. Our results are compared to recent experimental findings in detail.

35 pages, 20 figures, using Latex and graphicx, Figures 11 and 13 are changed, a number of typos corrected

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