6533b82dfe1ef96bd1291e7e
RESEARCH PRODUCT
Light Quark Masses from Lattice Quark Propagators at Large Momenta
V. GimenezG. MartinelliDamir BecirevicVittorio Lubiczsubject
PhysicsQuarkNuclear and High Energy PhysicsStrange quarkParticle physicsHigh Energy Physics::LatticeHigh Energy Physics::PhenomenologyNuclear TheoryHigh Energy Physics - Lattice (hep-lat)CHIRAL SYMMETRYFOS: Physical sciencesQuenched approximationNONPERTURBATIVE RENORMALIZATION CONSTANTSFermionDYNAMICAL WILSON FERMIONSPartícules (Física nuclear)RenormalizationHigh Energy Physics - PhenomenologyHigh Energy Physics - LatticeHigh Energy Physics - Phenomenology (hep-ph)Lattice gauge theoryHigh Energy Physics::ExperimentOperator product expansionMinimal subtraction schemeNuclear Experimentdescription
We compute non-perturbatively the average up-down and strange quark masses from the large momentum (short-distance) behaviour of the quark propagator in the Landau gauge. This method, which has never been applied so far, does not require the explicit calculation of the quark mass renormalization constant. Calculations were performed in the quenched approximation, by using O(a)-improved Wilson fermions. The main results of this study are ml^RI(2GeV)=5.8(6)MeV and ms^RI(2GeV)=136(11)MeV. Using the relations between different schemes, obtained from the available four-loop anomalous dimensions, we also find ml^RGI=7.6(8)MeV and ms^RGI=177(14)MeV, and the MSbar-masses, ml^MS(2GeV)=4.8(5)MeV and ms^MS(2GeV)=111(9)MeV.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-09-10 |