arXiv:1209.4486·v1·High Energy Physics — Phenomenology
Transverse momentum broadening and gauge invariance
Abstract
In the framework of the soft-collinear effective theory, we present a gauge invariant definition of the transverse momentum broadening probability of a highly-energetic collinear quark in a medium and consequently of the jet quenching parameter .
Comments: 8 pages, 7 figures; contribution to QCD@Work 2012, Lecce, June 18-21, 2012