Effective Quark Interactions and QCD-Propagators

Details Effective Quark Interactions and QCD-Propagators Effective Quark Interactions and QCD-Propagators

1997-08-21

arxiv.org/abs/hep-ph/9708425v2

Phys.Rev. D57 (1998) 1591-1604

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revised version, to appear in Phys. Rev. D; Introduction rewritten, 1 figure added. 35 pages, including 10 figures; Latex2e

Scientific paper

10.1103/PhysRevD.57.1591

We compute the momentum dependence of the effective four quark interaction in QCD after integrating out the gluons. Our method is based on a truncation of exact renormalization group equations which should give reasonable results for momenta above the confinement scale. The difference between the four quark interaction and the heavy quark potential can be minimized for an optimal renormalization scheme in Landau gauge. Within the momentum range relevant for quarkonia our results agree with phenomenological potentials. We also calculate the propagators for gluons and ghosts in Landau-gauge.

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