Chiral symmetry breaking revisited: the gap equation with lattice ingredients

Details Chiral symmetry breaking revisited: the gap equation with lattice ingredients Chiral symmetry breaking revisited: the gap equation with lattice ingredients

2010-11-25

arxiv.org/abs/1011.5645v1

AIP Conf.Proc.1343:358-360,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 5 figures. Talk presented at the Quark Confinement and the Hadron Spectrum - Madrid 2010, August 30th - September 3rd

Scientific paper

10.1063/1.3575029

We study chiral symmetry breaking in QCD, using as ingredients in the quark gap equation recent lattice results for the gluon and ghost propagators. The Ansatz employed for the quark-gluon vertex is purely non-Abelian, introducing a crucial dependence on the ghost dressing function and the quark-ghost scattering amplitude. The numerical impact of these quantities is considerable: the need to invoke confinement explicitly is avoided, and the dynamical quark masses generated are of the order of 300 MeV. In addition, the pion decay constant and the quark condensate are computed, and are found to be in good agreement with phenomenology.

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