Hard exclusive meson production and nonforward parton distributions

被引：125

作者：

Mankiewicz, L ^{[1
]}

Piller, G ^{[1
]}

Weigl, T ^{[1
]}

机构：

[1] Tech Univ Munchen, Dept Phys, D-85747 Garching, Germany

来源：

EUROPEAN PHYSICAL JOURNAL C | 1998年 / 5卷 / 01期

关键词：

D O I：

10.1007/s100529800829

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We present an analysis of twist-2, leading order QCD amplitudes for hard exclusive leptoproduction of mesons in terms of double/nonforward 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(o), eta, and neutral vector meson production amplitudes and discuss general features of the corresponding cross sections.

引用

页码：119 / 128

页数：10

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