Final state interactions and gauge invariant parton distributions

被引：530

作者：

Belitsky, AV ^{[1
]}

Ji, X ^{[1
]}

Yuan, F ^{[1
]}

机构：

[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

来源：

NUCLEAR PHYSICS B | 2003年 / 656卷 / 1-2期

关键词：

Parton distributions; light-cone gauge; final state interactions; dipole scattering;

D O I：

10.1016/S0550-3213(03)00121-4

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Parton distributions contain factorizable final state interaction effects originating from the fast-moving struck quark interacting with the target spectators in deeply inelastic scattering. We show that these interactions give rise to gauge invariance of the transverse momentum-dependent parton distributions. As compared to previous analyses, our study demonstrates the existence of extra scaling contributions from transverse components of the gauge potential at the light-cone infinity. They form a transverse gauge link which is indispensable for restoration of the gauge invariance of Parton distributions in the light-cone gauge where the gauge potential does not vanish asymptotically. Our finding helps to explain a number of features observed in a model calculation of structure functions in the light-cone gauge. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：165 / 198

页数：34

共 53 条

[1]

[Anonymous], HEPPH0111244

[2] SINGLE SPIN ASYMMETRY FOR P-UP-ARROW-P-]PI-X IN PERTURBATIVE QCD [J].