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Author
dc.contributor.author
Fodor, Z 
Author
dc.contributor.author
Hoelbling, C 
Author
dc.contributor.author
Krieg, S 
Author
dc.contributor.author
Lellouch, L 
Author
dc.contributor.author
Lippert, T 
Author
dc.contributor.author
Portelli, A 
Author
dc.contributor.author
Sastre, A 
Author
dc.contributor.author
Szabo, KK 
Author
dc.contributor.author
Varnhorst, L 
Availability Date
dc.date.accessioned
2020-04-07T08:52:48Z
Availability Date
dc.date.available
2020-04-07T08:52:48Z
Release
dc.date.issued
2016
uri
dc.identifier.uri
http://hdl.handle.net/10831/43235
Abstract
dc.description.abstract
In a previous Letter [Borsanyi et al., Phys. Rev. Lett. 111, 252001 (2013)] we determined the isospin mass splittings of the baryon octet from a lattice calculation based on N-f = 2 + 1 QCD simulations to which QED effects have been added in a partially quenched setup. Using the same data we determine here the corrections to Dashen's theorem and the individual up and down quark masses. Our ensembles include 5 lattice spacings down to 0.054 fm, lattice sizes up to 6 fm, and average up-down quark masses all the way down to their physical value. For the parameter which quantifies violations to Dashen's theorem, we obtain epsilon = 0.73(2)(5)(17), where the first error is statistical, the second is systematic, and the third is an estimate of the QED quenching error. For the light quark masses we obtain, m(u) = 2.27(6)(5)(4) and m(d) = 4.67(6)(5)(4) MeV in the modified minimal subtraction scheme at 2 GeV and the isospin breaking ratios m(u)/m(d) = 0.485(11)(8)(14), R = 38.2(1.1)(0.8)(1.4), and Q = 23.4(0.4)(0.3)(0.4). Our results exclude the m(u) = 0 solution to the strong CP problem by more than 24 standard deviations.
Language
dc.language
Angol
Title
dc.title
Up and Down Quark Masses and Corrections to Dashen's Theorem from Lattice QCD and Quenched QED
Type
dc.type
folyóiratcikk
Date Change
dc.date.updated
2019-07-17T07:33:42Z
Note
dc.description.note
CA Budapest-Marseille-Wuppertal Colla Megjegyzés-26089104 Group Author: Budapest-Marseille-Wuppertal Colla Megjegyzés-26089107 Group Author: Budapest-Marseille-Wuppertal Colla Megjegyzés-26089115 Group Author: Budapest-Marseille-Wuppertal Colla Megjegyzés-26089117 Group Author: Budapest-Marseille-Wuppertal Colla Megjegyzés-26089119 Group Author: Budapest-Marseille-Wuppertal Colla Megjegyzés-26215931 Group Author: Budapest-Marseille-Wuppertal Colla
Doi ID
dc.identifier.doi
10.1103/PhysRevLett.117.082001
Wos ID
dc.identifier.wos
000381495100005
ID Scopus
dc.identifier.scopus
84985028198
MTMT ID
dc.identifier.mtmt
3113003
Issue Number
dc.identifier.issue
8
abbreviated journal
dc.identifier.jabbrev
PHYS REV LETT
Journal
dc.identifier.jtitle
PHYSICAL REVIEW LETTERS
Volume Number
dc.identifier.volume
117
Release Date
dc.description.issuedate
2016
Pubmed ID
dc.identifier.pubmed
27588847
department of Author
dc.contributor.institution
MTA-ELTE Elméleti Fizikai Kutatócsoport
department of Author
dc.contributor.institution
MTA Határon Túli Magyarok Titkársága
department of Author
dc.contributor.institution
Elméleti Fizikai Tanszék
Author institution
dc.contributor.department
Elméleti Fizikai Tanszék


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Up and Down Quark Masses and Corrections to Dashen's Theorem from Lattice QCD and Quenched QED
 

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