A High Statistics Lattice Calculation of Quark Masses with a Non-Perturbative Renormalization Procedure

Physics – High Energy Physics – High Energy Physics - Lattice

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3 pages, Talk presented at LATTICE97(QCD Spectrum and Quark Masses). Small misprints corrected, no conclusions changed

Scientific paper

10.1016/S0920-5632(97)00710-X

We present results of a high statistics study (O(2000) configurations) of the quark masses in the MS-bar scheme from Lattice QCD in the quenched approximation at beta=6.0, beta=6.2 and beta=6.4 using both the Wilson and the tree-level improved SW-Clover fermion action. We extract quark masses from the meson spectroscopy and from the axial Ward Identity using non-perturbative values of the renormalization constants. We compare the results obtained with the two methods and we study the O(a) dependence of the quark masses for both actions. Our best results are m_s^(MS-bar)(2 GeV)=(123 +- 4 +- 15) MeV and m_c^(MS-bar)(2 GeV)=(1525 +- 40 +- 100) MeV.

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