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dc.contributor.authorChakraborty, B
dc.contributor.authorDavies, CTH
dc.contributor.authorGalloway, B
dc.contributor.authorKnecht, P
dc.contributor.authorKoponen, J
dc.contributor.authorDonald, GC
dc.contributor.authorDowdall, RJ
dc.contributor.authorLepage, GP
dc.contributor.authorMcNeile, C
dc.date.accessioned2019-09-01T16:21:13Z
dc.date.available2019-09-01T16:21:13Z
dc.date.issued2015
dc.identifier.issn1550-7998
dc.identifier.issn1550-2368
dc.identifier.other054508
dc.identifier.urihttp://hdl.handle.net/10026.1/14836
dc.description16 pages, 9 figures, 6 tables
dc.description.abstract

We present a new lattice QCD analysis of heavy-quark pseudoscalar-pseudoscalar correlators, using gluon configurations from the MILC Collaboration that include vacuum polarization from u, d, s, and c quarks (nf=4). We extract new values for the QCD coupling and for the c quark's MS¯ mass: αMS¯(MZ,nf=5)=0.11822(74) and mc(3GeV,nf=4)=0.9851(63)GeV. These agree well with our earlier simulations using nf=3 sea quarks, vindicating the perturbative treatment of c quarks in that analysis. We also obtain a new nonperturbative result for the ratio of c and s quark masses: mc/ms=11.652(65). This ratio implies ms(2GeV,nf=3)=93.6(8)MeV when it is combined with our new c mass. Combining mc/ms with our earlier mb/mc gives mb/ms=52.55(55), which is several standard deviations (but only 4%) away from the Georgi-Jarlskop prediction from certain grand unified theories. Finally we obtain an nf=4 estimate for mb/mc=4.528(54) which agrees well with our earlier nf=3 result. The new ratio implies mb(mb,nf=5)=4.162(48)GeV.

dc.format.extent0-0
dc.languageen
dc.language.isoen
dc.publisherAmerican Physical Society (APS)
dc.subject5106 Nuclear and Plasma Physics
dc.subject5107 Particle and High Energy Physics
dc.subject4902 Mathematical Physics
dc.subject49 Mathematical Sciences
dc.subject51 Physical Sciences
dc.titleHigh-precision quark masses and QCD coupling from nf=4 lattice QCD
dc.typejournal-article
dc.typeArticle
plymouth.author-urlhttp://arxiv.org/abs/1408.4169v3
plymouth.issue5
plymouth.volume91
plymouth.publisher-urlhttp://dx.doi.org/10.1103/physrevd.91.054508
plymouth.publication-statusPublished online
plymouth.journalPhysical Review D
dc.identifier.doi10.1103/physrevd.91.054508
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Engineering, Computing and Mathematics
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/EXTENDED UoA 10 - Mathematical Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA10 Mathematical Sciences
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
plymouth.organisational-group/Plymouth/Users by role/Researchers in ResearchFish submission
dcterms.dateAccepted2014-12-04
dc.identifier.eissn1550-2368
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1103/physrevd.91.054508
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review


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