A Lattice Determination of Light Quark Masses

Details A Lattice Determination of Light Quark Masses A Lattice Determination of Light Quark Masses

1999-08-05

arxiv.org/abs/hep-lat/9908005v1

Phys.Rev.D62:054504,2000

Physics

High Energy Physics

High Energy Physics - Lattice

Latex, 25 pages, 12 eps figures

Scientific paper

10.1103/PhysRevD.62.054504

A fully non-perturbative lattice determination of the up/down and strange quark masses is given for quenched QCD using both, $O(a)$ improved Wilson fermions and ordinary Wilson fermions. For the strange quark mass with $O(a)$ improved fermions we obtain $m^{\msbar}_s(\mu=2 {GeV}) = 105(4) {MeV}$, using the interquark force scale $r_0$. Due to quenching problems fits are only possible for quark masses larger than the strange quark mass. If we extrapolate our fits to the up/down quark mass we find for the average mass $m^{\msbar}_l(\mu=2 {GeV}) = 4.4(2) {MeV}$.

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