SINGLE TRANSVERSE SPIN ASYMMETRIES

被引：416

作者：

QIU, JW ^{[1
]}

STERMAN, G ^{[1
]}

机构：

[1] IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.67.2264

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using generalized factorization theorems, we calculate the leading single transverse spin asymmetry for high-transverse-momentum direct-photon production in pp collisions, in terms of partonic matrix elements. The leading contribution comes from a "twist-3" parton distribution, involving the correlation between quark fields and the gluonic field strength. With simple assumptions for this matrix element, the asymmetry increases With X(F), naturally giving effects of 10% or more at large X(F).

引用

页码：2264 / 2267

页数：4

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