Universality and Gluonic Pole Matrix Elements

被引：0

作者：

Gamberg, Leonard ^{[1
]}

Mukherjee, Asmita ^{[2
]}

Mulders, Piet ^{[3
]}

机构：

[1] Penn State Univ Berks, Dept Phys, Reading, PA 19610 USA

[2] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India

[3] Vrije Univ Amsterdam, Dept Phys & Astron, NL-1081 HV Amsterdam, Netherlands

来源：

SPIN PHYSICS | 2009年 / 1149卷

关键词：

Transverse Momentum; Gluonic Poles; Fragmentation Functions; TRANSVERSE-SPIN ASYMMETRIES; DRELL-YAN PROCESSES; SINGLE-SPIN; PARTON DISTRIBUTIONS; STATE INTERACTIONS; SPECTATOR MODEL; FRAGMENTATION; SCATTERING;

D O I：

暂无

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the spectral properties of quark-gluon-quark and quark-quark-gluon correlators in order to study gluonic pole matrix elements. Such matrix elements appear both for distribution functions such as the Sivers function, and fragmentation functions such as the Collins function. We find that for a large class of spectator models, the contribution of the gluonic pole matrix element for fragmentation functions vanishes. This result is important in the study of universality for fragmentation functions.

引用

页码：427 / +

页数：2

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