Vanishing dynamical quark mass at zero virtuality?

Abstract

We show that the dynamical quark mass in effective nonlocal models can vanish at zero virtuality of the quark as $M(p^2)\propto p^2$. Our arguments follow from the constrained-instanton model of the QCD vacuum and from QCD sum rules calculations with nonlocal condensates. The discussed models also lead to analyticity of $M(p^2)$ in the vicinity of zero.

9 pages, Latex, 3 figures

References in corpus (2)

• Infinite Volume and Continuum Limits of the Landau-Gauge Gluon Propagator
• Fit to Gluon Propagator and Gribov Formula

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