RENORMALIZATION-GROUP ANATOMY OF TRANSVERSE-MOMENTUM DEPENDENT PARTON DISTRIBUTION FUNCTIONS IN QCD

被引：10
|
作者：
Stefanis, N. G. [1 ]
Cherednikov, I. O. [2 ,3 ]
机构：
[1] Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany
[2] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia
[3] Univ Calabria, INFN Cosenza, I-87036 Arcavacata Di Rende, CS, Italy
来源：
MODERN PHYSICS LETTERS A | 2009年 / 24卷 / 35-37期
关键词：
Transverse-momentum dependence; Wilson lines; renormalization group; LIGHT-CONE GAUGE; LINES;
D O I：
10.1142/S0217732309001121
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The ultraviolet and rapidity divergences of transverse-momentum dependent parton distribution functions with lightlike and transverse gauge links is studied, also incorporating a soft eikonal factor. We find that in the light-cone gauge with q(-)-independent pole prescriptions extra divergences appear which amount, at one-loop, to a cusp-like anomalous dimension. We show that such contributions are absent when the Mandelstam-Leibbrandt prescription is used. In the first case, the soft factor cancels the anomalous-dimension defect, while in the second case its ultraviolet-divergent part reduces to unity.
引用
收藏
页码：2913 / 2923
页数：11
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