Towards the infrared limit in SU(3) Landau gauge lattice gluodynamics

Details Towards the infrared limit in SU(3) Landau gauge lattice gluodynamics Towards the infrared limit in SU(3) Landau gauge lattice gluodynamics

2005-06-06

arxiv.org/abs/hep-lat/0506007v2

Phys.Rev.D72:014507,2005

Physics

High Energy Physics

High Energy Physics - Lattice

10 pages, 6 figures. Revised version to appear in Phys.Rev.D. Title modified; a new subsection discusses finite volume and fin

Scientific paper

10.1103/PhysRevD.72.014507

We study the behavior of the gluon and ghost dressing functions in SU(3) Landau gauge at low momenta available on lattice sizes 12^4-32^4 at $\beta$=5.8, 6.0 and 6.2. We demonstrate the ghost dressing function to be systematically dependent on the choice of Gribov copies, while the influence on the gluon dressing function is not resolvable. The running coupling given in terms of these functions is found to be decreasing for momenta q<0.6 GeV. We study also effects of the finite volume and of the lattice discretization.

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