Hard Exclusive Meson Production and Nonforward Parton Distributions
High Energy Physics - Phenomenology
2011-02-01 v2
Abstract
We present an analysis of twist-2, leading order QCD amplitudes for hard exclusive leptoproduction of mesons in terms of double/nonforward parton distribution functions. After reviewing some general features of nonforward nucleon matrix elements of twist-2 QCD string operators, we propose a phenomenological model for quark and gluon nonforward distribution functions. The corresponding QCD evolution equations are solved in the leading logarithmic approximation for flavor nonsinglet distributions. We derive explicit expressions for hard exclusive pi^0, eta, and neutral vector meson production amplitudes and discuss general features of the corresponding cross sections.
Keywords
Cite
@article{arxiv.hep-ph/9711227,
title = {Hard Exclusive Meson Production and Nonforward Parton Distributions},
author = {L. Mankiewicz and G. Piller and T. Weigl},
journal= {arXiv preprint arXiv:hep-ph/9711227},
year = {2011}
}
Comments
23 pages, Latex, to be published in Z. Phys. C