Light quark masses in quenched QCD with exact chiral symmetry

Physics – High Energy Physics – High Energy Physics - Lattice

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5 pages, LaTeX, in v2: the missing numerical factor in (13) is restored, and the physical quark masses (16)-(17) are in good a

Scientific paper

10.1016/S0370-2693(02)02023-3

The parameters in the pseudoscalar meson mass formula in quenched chiral perturbation theory to one-loop order are determined by quenched lattice QCD with overlap Dirac operator, and from which the light quark masses are determined with the experimental inputs of pion and kaon masses, and the pion decay constant. Our results are $ m_{u,d} = 5.3 \pm 0.3 $ MeV, and $ m_s = 115\pm 8 $ MeV, in the $ \bar{MS} $ scheme at scale $ \mu = 2 $ GeV.

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