Aspects of the confinement mechanism in Coulomb-gauge QCD

Details Aspects of the confinement mechanism in Coulomb-gauge QCD Aspects of the confinement mechanism in Coulomb-gauge QCD

2005-10-03

arxiv.org/abs/hep-ph/0510028v1

Phys.Rev.Lett96:022001,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.96.022001

Phenomenological consequences of the infrared singular, instantaneous part of the gluon propagator in Coulomb gauge are investigated. The corresponding quark Dyson-Schwinger equation is solved, neglecting retardation and transverse gluons and regulating the resulting infrared singularities. While the quark propagator vanishes as the infrared regulator goes to zero, the frequency integral over the quark propagator stays finite and well-defined. Solutions of the homogeneous Bethe-Salpeter equation for the pseudoscalar and vector mesons as well as for scalar and axial-vector diquarks are obtained. In the limit of a vanishing infrared regulator the diquark masses diverge, while meson properties and diquark radii remain finite and well-defined. These features are interpreted with respect to the resulting aspects of confinement for colored quark-quark correlations.

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