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Non-perturbatively renormalised light quark masses from a lattice simulation with N(f) = 2

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Non-perturbatively renormalised light quark masses from a lattice simulation with N(f) = 2

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Becirevic, D.; Blossier, B.; Boucaud, Ph.; Giménez Gómez, Vicente; Lubicz, V.; Mescia, Federico; Simula, S.; Tarantino, C.

This document is a artículoDate2006

Este documento está disponible también en : http://hdl.handle.net/10550/38968

We present results for the light quark masses obtained from a lattice QCD simulation with N-f = 2 degenerate Wilson dynamical quark flavours. The sea quark masses of our lattice, of spacing a similar or equal to 0.06 fm, are relatively heavy, i.e., they cover the range corresponding to 0.60 less than or similar to M-p/M-V less than or similar to 0.75. After implementing the non-perturbative RI-MOM method to renormalise quark masses, we obtain m(ud)((MS) over bar)(2 GeV)= 4.3 +/- 0.4(-0)(+1.1) MeV, and m(s)((MS) over bar)(2 GeV) = 101 +/- 8(-0)(+25) MeV, which are about 15% larger than they would be if renormalised perturbatively. In addition, we show that the above results are compatible with those obtained in a quenched simulation with a similar lattice.

Becirevic, D. Blossier, B. Boucaud, Ph. Giménez Gómez, Vicente Lubicz, V. Mescia, Federico Simula, S. Tarantino, C. 2006 Non-perturbatively renormalised light quark masses from a lattice simulation with N(f) = 2 Nuclear Physics B 734 1-2 138 155

http://dx.doi.org/10.1016/j.nuclphysb.2005.11.014