Soft and collinear factorization and transverse momentum dependent parton distribution functions

被引：146

作者：

Echevarria, Miguel G. ^{[1
]}

Idilbi, Ahmad ^{[2
]}

Scimemi, Ignazio ^{[1
]}

机构：

[1] Univ Complutense Madrid, Dept Fis Teor 2, E-28040 Madrid, Spain

[2] European Ctr Theoret Studies Nucl Phys & Related, I-38123 Villazzano, Trento, Italy

来源：

PHYSICS LETTERS B | 2013年 / 726卷 / 4-5期

关键词：

RENORMALIZATION;

D O I：

10.1016/j.physletb.2013.09.003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this work we consider how a parton distribution function, with an explicit transverse momentum dependence can be properly defined in a regularization-scheme independent manner. We argue that by considering a factorized form of the transverse momentum dependent spectrum for the production of a heavy lepton pair in Drell-Yan reaction, one should first split the relevant soft function into two boost invariant contributions. When those soft contributions are added to the pure collinear contributions, well-defined hadronic matrix elements emerge, i.e., the transverse momentum dependent distributions. We also perform a comparison with Collins' definition. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：795 / 801

页数：7

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