Non-perturbative renormalization factors of bilinear quark operators for Kogut-Susskind fermions and light quark masses in quenched QCD

Details Non-perturbative renormalization factors of bilinear quark operators for Kogut-Susskind fermions and light quark masses in quenched QCD Non-perturbative renormalization factors of bilinear quark operators for Kogut-Susskind fermions and light quark masses in quenched QCD

1998-09-16

arxiv.org/abs/hep-lat/9809124v1

Nucl.Phys.Proc.Suppl. 73 (1999) 279-281

Physics

High Energy Physics

High Energy Physics - Lattice

LATTICE98(matrixelement), 3 pages, 4 eps figures

Scientific paper

10.1016/S0920-5632(99)85047-6

Light quark masses are computed for Kogut-Susskind fermions by evaluating non-perturbatively the renormalization factor for bilinear quark operators. Calculations are carried out in the quenched approximation at \beta=6.0, 6.2, and 6.4. For the average up and down quark mass we find $m_{\bar MS}(2 GeV)= 4.15(27) MeV$ in the continuum limit, which is significantly larger than $3.51(20) MeV$ ($q^*=1/a$) or $3.40(21) MeV$ ($q^*=\pi/a$) obtained with the one-loop perturbative renormalization factor.

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