Gauge invariance and renormalization-group effects in transverse-momentum dependent parton distribution functions
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
A range of issues pertaining to the use of Wilson lines in integrated and transverse-momentum dependent (TMD) parton distribution functions (PDF) is discussed. The relation between gauge invariance and the renormalization properties of the Wilson-line integrals is given particular attention. Using an anomalous-dimensions based analysis in the light-cone gauge, a generalized definition of the TMD PDFs is proposed, which employs a cusped Wilson line, and contains an intrinsic "Coulomb-like" phase.
Keywords
Cite
@article{arxiv.0711.1278,
title = {Gauge invariance and renormalization-group effects in transverse-momentum dependent parton distribution functions},
author = {I. O. Cherednikov and N. G. Stefanis},
journal= {arXiv preprint arXiv:0711.1278},
year = {2008}
}
Comments
5 pages, 2 figures, Invited talk presented by the first author at the XII Advanced Research Workshop on High Energy Spin Physics (DSPIN-07), September 3-7, 2007, Dubna, Russia