Abstract

We consider the condensate 〈: ψ(x)ψ(y):〉 in the chirally symmetric Nambu-Jona-Lasinio model with two flavours. We Taylor expand the condensate and calculate the leading non-local correction in mean field approximation. The QCD generated up and down quark condensates are found to fall off with a scale of 1.7 fm. We also discuss non-local condensates in the context of composite models.

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