出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：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, hy¯yiMS(2GeV)=(2655stat22syst MeV)3, and of the renormalization constant
of the quark eld, ZMS
y (2GeV) = 0:8710:003stat0:020syst . This new method also provides a
remarkable non-perturbative test of the OPE predictions at short distance in QCD.
