Collins fragmentation function for pions and kaons in a spectator model

被引：78

作者：

Bacchetta, Alessandro ^{[1
]}

Gamberg, Leonard P. ^{[2
]}

Goldstein, Gary R. ^{[3
]}

Mukherjee, Asmita ^{[4
]}

机构：

[1] DESY, Theory Grp, D-22603 Hamburg, Germany

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

[3] Tufts Univ, Dept Phys & Astron, Medford, MA 02155 USA

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

来源：

PHYSICS LETTERS B | 2008年 / 659卷 / 1-2期

关键词：

D O I：

10.1016/j.physletb.2007.09.076

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the Collins fragmentation function in the framework of a spectator model with pseudoscalar pion-quark coupling and a Gaussian form factor at the vertex. We determine the model parameters by fitting the unpolarized fragmentation function for pions and kaons. We show that the Collins function for the pions in this model is in reasonable agreement with recent parametrizations obtained by fits of the available data. In addition, we compute for the first time the Collins function for the kaons. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：234 / 243

页数：10

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