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 m<((MS)(s))over bar>ms(2 GeV) = (106 +/- 2 +/- 8) MeV and m<((MS)(l))over bar>(2 GeV) = (4.4 +/- 0.1 +/- 0.4) MeV.

Becirevic, D., Gimenez, V., Lubicz, V., Martinelli, G., Papinutto, M., Reyes, J., et al. (2003). Non-perturbative renormalization constants and light quark masses. In LATTICE 2002. Proceedings of the XXth International Symposium on Lattice Field Theory (pp.442-445) [10.1016/S0920-5632(03)01580-9].

Non-perturbative renormalization constants and light quark masses

LUBICZ, Vittorio;TARANTINO, CECILIA
2003-01-01

Abstract

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 m<((MS)(s))over bar>ms(2 GeV) = (106 +/- 2 +/- 8) MeV and m<((MS)(l))over bar>(2 GeV) = (4.4 +/- 0.1 +/- 0.4) MeV.
2003
Becirevic, D., Gimenez, V., Lubicz, V., Martinelli, G., Papinutto, M., Reyes, J., et al. (2003). Non-perturbative renormalization constants and light quark masses. In LATTICE 2002. Proceedings of the XXth International Symposium on Lattice Field Theory (pp.442-445) [10.1016/S0920-5632(03)01580-9].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/178781
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