Gauge-invariant nonlocal quark condensates in QCD
M. D'Elia, A. Di Giacomo, E. Meggiolaro
Abstract
We study, by numerical simulations on a lattice, the behaviour of the gauge-invariant nonlocal quark condensates in the QCD vacuum both in the quenched approximation and with four flavours of dynamical staggered fermions. The correlation length of the condensate is determined to be roughly twice as big as in the case of the gluon field strength correlators.
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