Domain wall QCD with physical quark masses

RBC UKQCD Collaborations

Research output: Contribution to journalArticlepeer-review

Abstract

We present results for several light hadronic quantities (fπ, fK, BK, mud, ms, t1/20, w0) obtained from simulations of 2+1 flavor domain wall lattice QCD with large physical volumes and nearly physical pion masses at two lattice spacings. We perform a short, O(3)%, extrapolation in pion mass to the physical values by combining our new data in a simultaneous chiral/continuum “global fit” with a number of other ensembles with heavier pion masses. We use the physical values of mπ, mK and mΩ to determine the two quark masses and the scale—all other quantities are outputs from our simulations. We obtain results with subpercent statistical errors and negligible chiral and finite-volume systematics for these light hadronic quantities, including fπ=130.2(9)  MeV; fK=155.5(8)  MeV; the average up/down quark mass and strange quark mass in the MS scheme at 3 GeV, 2.997(49) and 81.64(1.17) MeV respectively; and the neutral kaon mixing parameter, BK, in the renormalization group invariant scheme, 0.750(15) and the MS scheme at 3 GeV, 0.530(11).
Original languageEnglish
Article number074505
JournalPhysical Review D
Volume93
Issue number7
DOIs
Publication statusPublished - 12 Apr 2016

Keywords

  • hep-lat

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