QCD condensate contributions to the effective quark potential in a covariant gauge

Details QCD condensate contributions to the effective quark potential in a covariant gauge QCD condensate contributions to the effective quark potential in a covariant gauge

1999-03-08

arxiv.org/abs/hep-ph/9903281v2

Phys.Rev. D60 (1999) 114005

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 2 figures

Scientific paper

10.1103/PhysRevD.60.114005

We discuss QCD condensate contributions to the gluon propagator both in the fixed-point gauge and in covariant gauges for the external QCD vacuum gluon fields with the conclusion that a covariant gauge is essential to obtain a gauge invariant QCD vacuum energy density difference and to retain the unitarity of the quark scattering amplitude. The gauge-invariant QCD condensate contributions to the effective one-gluon exchange potential are evaluated by using the effective gluon propagator which produces a gauge-independent quark scattering amplitude.

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