Factorization for hard exclusive electroproduction of mesons in QCD

被引：788

作者：

Collins, JC ^{[1
]}

Frankfurt, L ^{[1
]}

Strikman, M ^{[1
]}

机构：

[1] TEL AVIV UNIV,DEPT PHYS,IL-69978 TEL AVIV,ISRAEL

来源：

PHYSICAL REVIEW D | 1997年 / 56卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.56.2982

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We formulate and prove a QCD factorization theorem for hard exclusive electroproduction of mesons in QCD. The proof is valid for the leading power in Q and all logarithms. This generalizes previous work on vector meson production in the diffractive region of small x. The amplitude is expressed in terms of off-diagonal generalizations of the usual parton densities. The full theorem applies to all kinds of mesons and not just to vector mesons. The parton densities used include not only the ordinary parton density, but also the helicity density (g(1) or Lambda q) and the transversity density (h(1) or delta q), and these can be probed by measuring the polarization of the produced mesons with unpolarized protons.

引用

页码：2982 / 3006

页数：25

共 48 条

[41] Asymmetric gluon distributions and hard diffractive electroproduction [J].