Soft Wilson lines in soft-collinear effective theory
Abstract
The effects of the soft gluon emission in hard scattering processes at the phase boundary are resummed in the soft-collinear effective theory (SCET). In SCET, the soft gluon emission is decoupled from the energetic collinear part, and is obtained by the vacuum expectation value of the soft Wilson-line operator. The form of the soft Wilson lines is universal in deep inelastic scattering, in the Drell-Yan process, in the jet production from e+e- collisions, and in the gamma* gamma* -> pi0 process, but its analytic structure is slightly different in each process. The anomalous dimensions of the soft Wilson-line operators for these processes are computed along the light-like path at leading order in SCET and to first order in alpha_s, and the renormalization group behavior of the soft Wilson lines is discussed.
Cite
@article{arxiv.hep-ph/0412110,
title = {Soft Wilson lines in soft-collinear effective theory},
author = {Junegone Chay and Chul Kim and Yeong Gyun Kim and Jong-Phil Lee},
journal= {arXiv preprint arXiv:hep-ph/0412110},
year = {2009}
}
Comments
36 pages, 10 figures, 3 tables