Show simple item record

dc.contributor.authorMateu Barreda, Vicent
dc.contributor.authorStewart, Iain
dc.contributor.authorThaler, Jesse
dc.date.accessioned2013-04-03T15:38:38Z
dc.date.available2013-04-03T15:38:38Z
dc.date.issued2013-01
dc.date.submitted2012-09
dc.identifier.issn1550-7998
dc.identifier.issn1089-4918
dc.identifier.urihttp://hdl.handle.net/1721.1/78267
dc.description.abstractWe introduce an operator depending on the “transverse velocity” 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. 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.en_US
dc.description.sponsorshipUnited States. Dept. of Energy (Grant DE-FG02-94ER-40818)en_US
dc.description.sponsorshipUnited States. Dept. of Energy (Grant DEFG02- 05ER-41360)en_US
dc.description.sponsorshipEuropean Community. Marie-Curie Research Networks (Contract PITN-GA-2010-264564)en_US
dc.description.sponsorshipMarie Curie Individual Fellowships (Contract PIOF-GA-2009-251174)en_US
dc.description.sponsorshipUnited States. Dept. of Energy. Early Career Research Program (DE-FG02-11ER- 41741)en_US
dc.language.isoen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevD.87.014025en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAPSen_US
dc.titlePower corrections to event shapes with mass-dependent operatorsen_US
dc.typeArticleen_US
dc.identifier.citationMateu, Vicent, Iain W. Stewart, and Jesse Thaler. “Power Corrections to Event Shapes with Mass-dependent Operators.” Physical Review D 87.1 (2013).en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.departmentMassachusetts Institute of Technology. Laboratory for Nuclear Scienceen_US
dc.contributor.mitauthorMateu Barreda, Vicent
dc.contributor.mitauthorStewart, Iain
dc.contributor.mitauthorThaler, Jesse
dc.relation.journalPhysical Review Den_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsMateu, Vicent; Stewart, Iain W.; Thaler, Jesseen
dc.identifier.orcidhttps://orcid.org/0000-0002-2406-8160
dc.identifier.orcidhttps://orcid.org/0000-0003-0248-0979
mit.licensePUBLISHER_POLICYen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record