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arXiv · hep-ph/0403044

Estimate of the chiral condensate in quenched lattice QCD

Damir Becirevic·Vittorio Lubicz
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Abstract

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

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Damir Becirevic, Vittorio Lubicz. 2004-07-31. Estimate of the chiral condensate in quenched lattice QCD. https://doi.org/10.1016/j.physletb.2004.07.065

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