TRANSVERSE-MOMENTUM PARTON DENSITIES: GAUGE LINKS, DIVERGENCES AND SOFT FACTOR

被引：0
作者：
Cherednikov, I. O. [1 ,2 ]
Stefanis, N. G. [3 ]
机构：
[1] Univ Calabria, INFN Cosenza, I-87036 Arcavacata Di Rende, CS, Italy
[2] JINR, Bogoliubov Lab Theoret Phys, RU-141980 Dubna, Russia
[3] Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany
来源：
EXCLUSIVE REACTIONS AT HIGH MOMENTUM TRANSFER IV | 2011年
关键词：
Parton distribution functions; Wilson lines; renormalization; LIGHT-CONE GAUGE; RENORMALIZATION; LINES;
D O I：
暂无
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：
We discuss the state-of-the-art of the theory of transverse-momentum dependent parton densities (TMDs), paying special attention to their renormalization properties, the structure of the gauge links in the operator definition, and the role of the soft factor in the factorization formula within the TMD approach to the semi-inclusive processes. We argue that the use of the lightcone axial gauge offers certain advantages for a consistent definition of TMDs as compared to the off-the-light-cone gauges, or covariant gauges with off-the-lightcone gauge links.
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页码：363 / 369
页数：7
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