Worldline techniques and QCD observables
Abstract
This report attempts to capture the essential workings of gauge links (Wilson lines) inside gauge-invariant formulations of parton distribution functions in QCD and gain some deeper insight into their key (renormalization) properties. We show, in particular, that the one-loop anomalous dimension of the Cherednikov-Stefanis quark TMD PDF is in the lightcone gauge , combined with the Mandelstam--Leibbrandt pole prescription, the same as that obtained in the special covariant gauge , leaving no uncanceled rapidity singularities.
Cite
@article{arxiv.1211.7218,
title = {Worldline techniques and QCD observables},
author = {N. G. Stefanis},
journal= {arXiv preprint arXiv:1211.7218},
year = {2013}
}
Comments
8 pages, 2 figures. Presented at Light-Cone 2012, July 08-13, 2012, Cracow, Poland. Dedicated to the memory of Walter Gloeckle, teacher, friend, and colleague. V2 has a couple of minor corrections. V3 matches version accepted for publication in Acta Physica Polonica B