6533b83afe1ef96bd12a7b0b
RESEARCH PRODUCT
Nonperturbative renormalization constants and light quark masses
Guido MartinelliV. GimenezCecilia TarantinoDamir BecirevicJ. ReyesMauro PapinuttoVittorio Lubiczsubject
QuarkPhysicsCouplingNuclear and High Energy PhysicsParticle physicsHigh Energy Physics::LatticeContinuum (design consultancy)High Energy Physics - Lattice (hep-lat)High Energy Physics::PhenomenologyExtrapolationDown quarkFOS: Physical sciencesFísicaAtomic and Molecular Physics and OpticsRenormalizationHigh Energy Physics - LatticeLattice (music)High Energy Physics::ExperimentNon-perturbativedescription
We present the results of an extensive non-perturbative calculation of the renormalization constants of bilinear quark operators for the non-perturbatively O(a)-improved Wilson action. The results are obtained at four values of the lattice coupling, by using the RI/MOM and the Ward identities methods. A new non-perturbative renormalization technique, which is based on the study of the lattice correlation functions at short distance in x-space, is also numerically investigated. We then use our non-perturbative determination of the quark mass renormalization constants to compute the values of the strange and the average up/down quark masses. After performing an extrapolation to the continuum limit, we obtain ms^msbar(2 GeV) = (106 +- 2 +- 8) MeV and ml^msbar(2 GeV)=(4.4 +- 0.1 +- 0.4) MeV.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-09-30 |