Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-11-04
Eur.Phys.J.C5:119-128,1998
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages, Latex, to be published in Z. Phys. C
Scientific paper
10.1007/s100520050253
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.
Mankiewicz Lech
Piller Gunther
Weigl T.
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