Precise charm to strange mass ratio and light quark masses from full lattice QCD.
By using a single formalism to handle charm, strange, and light valence quarks in full lattice QCD for the first time, we are able to determine ratios of quark masses to 1%. For m(c)/m(s) we obtain 11.85(16), an order of magnitude more precise than the current PDG average. Combined with 1% determinations of the charm quark mass now possible this gives m(s)(2 GeV)=92.4(1.5) MeV. The MILC result for m(s)/m(l)=27.2(3) yields m(l)(2 GeV)=3.40(7) MeV for the average of u and d quark masses.
Davies
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Department of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom. c.davies@physics.gla.ac.uk
McNeile
C
C
Wong
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KY
Follana
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E
Horgan
R
R
Hornbostel
K
K
Lepage
G P
GP
Shigemitsu
J
J
Trottier
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