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dc.contributor.authorHoang, Andre H.
dc.contributor.authorJain, Ambar
dc.contributor.authorScimemi, Ignazio
dc.contributor.authorStewart, Iain
dc.date.accessioned2011-01-26T14:57:09Z
dc.date.available2011-01-26T14:57:09Z
dc.date.issued2010-07
dc.date.submitted2010-08
dc.identifier.issn1550-7998
dc.identifier.issn1550-2368
dc.identifier.urihttp://hdl.handle.net/1721.1/60846
dc.description.abstractPerturbative QCD results in the MS̅ scheme can be dramatically improved by switching to a scheme that accounts for the dominant power law dependence on the factorization scale in the operator product expansion. We introduce the “MSR scheme” which achieves this in a Lorentz and gauge invariant way and has a very simple relation to MS̅ . Results in MSR depend on a cutoff parameter R, in addition to the μ of MS̅ . R variations can be used to independently estimate (i.) the size of power corrections, and (ii.) higher-order perturbative corrections (much like μ in MS̅ ). We give two examples at three-loop order, the ratio of mass splittings in the B*-B and D*-D systems, and the Ellis-Jaffe sum rule as a function of momentum transfer Q in deep inelastic scattering. Comparing to data, the perturbative MSR results work well even for Q∼1  GeV, and power corrections are reduced compared to MS̅ .en_US
dc.description.sponsorshipSpain. Ministerio de Educación y Ciencia (MEC) (FPA2008-00592)en_US
dc.description.sponsorshipEuropean Union. Flavianet (MRTNCT - 2006-035482)en_US
dc.description.sponsorshipBanco Santander Central Hispano (UCM-BSCH GR58/08 910309)en_US
dc.description.sponsorshipUnited States. Dept. of Energy. Office of Nuclear Physics (Grant No. DE-FG02-94ER40818)en_US
dc.description.sponsorshipAlexander von Humboldt-Stiftungen_US
dc.description.sponsorshipMax Planck Society for the Advancement of Scienceen_US
dc.language.isoen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevD.82.011501en_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.titleR evolution: Improving perturbative QCDen_US
dc.typeArticleen_US
dc.identifier.citationHoang, Andre H. et al. "." Physical Review D 82.1 (2010): 011501. © 2010 The American Physical Societyen_US
dc.contributor.departmentMassachusetts Institute of Technology. Center for Theoretical Physicsen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.approverStewart, Iain
dc.contributor.mitauthorJain, Ambar
dc.contributor.mitauthorStewart, Iain
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.orderedauthorsHoang, André; Jain, Ambar; Scimemi, Ignazio; Stewart, Iainen
dc.identifier.orcidhttps://orcid.org/0000-0003-0248-0979
mit.licensePUBLISHER_POLICYen_US


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