Operator product expansion and quark condensate from LQCD in coordinate space

Details Operator product expansion and quark condensate from LQCD in coordinate space Operator product expansion and quark condensate from LQCD in coordinate space

2005-10-20

arxiv.org/abs/hep-lat/0510090v1

PoS LAT2005 (2005) 081

Physics

High Energy Physics

High Energy Physics - Lattice

6 pp. Talk given at the 23rd International Symposium on Lattice Field Theory: Lattice 2005, Trinity College, Dublin, Ireland,

Scientific paper

We perform an exploratory study of the operator product expansion of the quark propagator on the lattice at short distance in coordinate space. This permits a simple determination of the quark condensate, ^MS(2 GeV)=(-265\pm 5\pm 22 MeV)^3, and of the renormalization constant of the quark field, Z^MS(2 GeV)=0.871 \pm 0.003 \pm 0.020. This new method also provides a remarkable non-perturbative test of the OPE predictions at short distance in QCD.

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