Factorization and Resummation for Jet Broadening
High Energy Physics - Phenomenology
2015-05-27 v1
Abstract
Jet broadening is an event-shape variable probing the transverse momenta of particles inside jets. It has been measured precisely in e+e- annihilations and is used to extract the strong coupling constant. The factorization of the associated cross section at small values of the broadening is afflicted by a collinear anomaly. Based on an analysis of this anomaly, we present the first all-order expressions for jet-broadening distributions, which are free of large perturbative logarithms in the two-jet limit. Our formulae reproduce known results at next-to-leading logarithmic order but also extend to higher orders.
Cite
@article{arxiv.1104.4108,
title = {Factorization and Resummation for Jet Broadening},
author = {Thomas Becher and Guido Bell and Matthias Neubert},
journal= {arXiv preprint arXiv:1104.4108},
year = {2015}
}
Comments
15 pages, 4 figures