Light quark masses from the lattice

B. Klaus; D. Petters; D. Pleiter; G. Schierholz; H. Oelrich; M. Gockeler; P.E.L. Rakow; P. Stephenson; R. Horsley; W. Kurzinger

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Light quark masses from the lattice

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arxiv hep-lat/9908028 v1 pith:JTCCNXUO submitted 1999-08-20 hep-lat

M. Gockeler , R. Horsley , B. Klaus , W. Kurzinger , H. Oelrich , D. Petters , D. Pleiter , P.E.L. Rakow

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G. Schierholz P. Stephenson

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keywords fermionsimprovedmassesmsbarquarkcomparisoncompletelyestimate

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A completely non-perturbative estimate is given for the u/d and strange quark masses in quenched QCD using O(a) improved fermions and, for comparison, Wilson fermions. For improved fermions we find m_{u/d}^MSbar(\mu=2 GeV) = 4.4(2) MeV, m_s^MSbar(\mu=2 GeV) = 105(4) MeV when using r_0 to set the physical scale.

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