Abstract
Using operator product methods in the fixed point gauge, we demonstrate that gluon condensate contributions to the quark propagator enhance the magnitude of the difference between the constituent quark mass and the purely dynamical mass contribution generated from quark condensate contributions. This difference, which vanishes in the limit of lagrangian chiral symmetry, constitutes an effective current quark mass that to O( g 2 s ) is equal to the product of the true current quark mass (i.e. low-energy QCD lagrangian mass) and gluon condensate dependent enhancement factor. This enhancement factor, which for up and down quarks is a number ≳4, may serve to reconcile standard estimates of current quark masses with larger phenomenologically motivated values.
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