@Article{Mateu_etal2013,
author="Mateu, V.
and Stewart, I. W.
and Thaler, J.",
title="Power corrections to event shapes with mass-dependent operators",
journal="Physical Review D",
year="2013",
publisher="Amer Physical Soc",
volume="87",
number="1",
pages="014025--25pp",
abstract="We introduce an operator depending on the {\textquoteleft}{\textquoteleft}transverse velocity{\textquoteright}{\textquoteright} r that describes the effect of hadron masses on the leading 1/Q power correction to event-shape observables. Here, Q is the scale of the hard collision. This work builds on earlier studies of mass effects by Salam and Wicke [J. High Energy Phys. 05 (2001) 061] and of operators by Lee and Sterman [Phys. Rev. D 75, 014022 (2007)]. Despite the fact that different event shapes have different hadron mass dependence, we provide a simple method to identify universality classes of event shapes whose power corrections depend on a common nonperturbative parameter. We also develop an operator basis to show that at a fixed value of Q, the power corrections for many classic observables can be determined by two independent nonperturbative matrix elements at the 10{\%} level. We compute the anomalous dimension of the transverse velocity operator, which is multiplicative in r and causes the power correction to exhibit nontrivial dependence on Q. The existence of universality classes and the relevance of anomalous dimensions are reproduced by the hadronization models in Pythia 8 and Herwig++, though the two programs differ in the values of their low-energy matrix elements.",
optnote="WOS:000314229300005",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1323), last updated on Fri, 01 Mar 2013 11:24:57 +0000",
issn="1550-7998",
doi="10.1103/PhysRevD.87.014025",
opturl="http://arxiv.org/abs/arXiv:1209.3781",
opturl="https://doi.org/10.1103/PhysRevD.87.014025",
archivePrefix="arXiv",
eprint="arXiv:1209.3781",
language="English"
}