We determine the value of the quark condensate from quenched QCD simulations on the lattice in two ways: (i) by using the Gell-Mann-Oakes-Renner (GMOR) formula; (ii) by comparing the OPE prediction for the Goldstone pole contribution to the pseudoscalar vertex, at moderately large momenta. In the MS scheme at mu = 2 GeV, from the GMOR formula we obtain (qq) = - (273 +/- 19 MeV)(3). We show that the value extracted from the pseudoscalar vertex, (qq) (312 +/- 24 MeV)(3), although larger, is consistent with the result obtained from the first (standard) method. (C) 2004 Published by Elsevier B.V.

Becirevic, D., Lubicz, V. (2004). Estimate of the chiral condensate in quenched lattice QCD. PHYSICS LETTERS. SECTION B, 600(1-2), 83-90 [10.1016/j.physletb.2004.07.065].

Estimate of the chiral condensate in quenched lattice QCD

LUBICZ, Vittorio
2004-01-01

Abstract

We determine the value of the quark condensate from quenched QCD simulations on the lattice in two ways: (i) by using the Gell-Mann-Oakes-Renner (GMOR) formula; (ii) by comparing the OPE prediction for the Goldstone pole contribution to the pseudoscalar vertex, at moderately large momenta. In the MS scheme at mu = 2 GeV, from the GMOR formula we obtain (qq) = - (273 +/- 19 MeV)(3). We show that the value extracted from the pseudoscalar vertex, (qq) (312 +/- 24 MeV)(3), although larger, is consistent with the result obtained from the first (standard) method. (C) 2004 Published by Elsevier B.V.
2004
Becirevic, D., Lubicz, V. (2004). Estimate of the chiral condensate in quenched lattice QCD. PHYSICS LETTERS. SECTION B, 600(1-2), 83-90 [10.1016/j.physletb.2004.07.065].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/150954
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