Vanishing dynamical quark mass at zero virtuality?

Details Vanishing dynamical quark mass at zero virtuality? Vanishing dynamical quark mass at zero virtuality?

2001-10-04

arxiv.org/abs/hep-ph/0110056v1

Phys.Rev. D65 (2002) 094007

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, Latex, 3 figures

Scientific paper

10.1103/PhysRevD.65.094007

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.

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