We compute the strange and the average up/down quark masses in the quenched approximation of lattice QCD, by using the O(a)-improved Wilson action and operators and implementing the non-perturbative renormalization. Our computation is performed at four values of the lattice spacing, from which we could extrapolate to the continuum limit. Our final result for the strange quark mass is m(s)((MS) over bar) (2 GeV) = (106 +/- 2 +/- 8) MeV. For the average up/down quark mass we obtain m(l)((MS) over bar) (2 GeV) = (4.4 +/- 0.1 +/- 0.4) MeV and the ratio m(s)/m(l) = (24.3 +/- 0.2 +/- 0.6).
Becirevic, D., Lubicz, V., Tarantino, C. (2003). Continuum determination of light quark masses from quenched lattice QCD. PHYSICS LETTERS. SECTION B, 558(1-2), 69-78 [10.1016/S0370-2693(03)00241-7].
Continuum determination of light quark masses from quenched lattice QCD
LUBICZ, Vittorio;TARANTINO, CECILIA
2003-01-01
Abstract
We compute the strange and the average up/down quark masses in the quenched approximation of lattice QCD, by using the O(a)-improved Wilson action and operators and implementing the non-perturbative renormalization. Our computation is performed at four values of the lattice spacing, from which we could extrapolate to the continuum limit. Our final result for the strange quark mass is m(s)((MS) over bar) (2 GeV) = (106 +/- 2 +/- 8) MeV. For the average up/down quark mass we obtain m(l)((MS) over bar) (2 GeV) = (4.4 +/- 0.1 +/- 0.4) MeV and the ratio m(s)/m(l) = (24.3 +/- 0.2 +/- 0.6).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
