Hadron Mass Effects in Power Corrections to Event Shapes
High Energy Physics - Phenomenology
2013-01-22 v1
Abstract
We study the effect of hadron masses on the leading power correction of dijet event-shape distributions. We define the transverse velocity operator, that describes the effects of hadron masses. It depends on the "transverse velocity" r, which is different from one only for non-vanishing hadron masses. We find that hadron-mass effects in general break universality. However we provide a simple method to identify universality classes of event shapes with a common power correction. We also compute the anomalous dimension of the power correction and the structure of the corresponding Wilson coefficient, finding a nontrivial result.
Keywords
Cite
@article{arxiv.1301.4555,
title = {Hadron Mass Effects in Power Corrections to Event Shapes},
author = {Vicent Mateu and Iain W. Stewart and Jesse Thaler},
journal= {arXiv preprint arXiv:1301.4555},
year = {2013}
}
Comments
8 pages, 3 figures, 2 tables, to appear in the proceedings of Xth Quark Confinement and the Hadron Spectrum