Phys. Rev. D 72, 014507 (2005) [10 pages]Towards the infrared limit in SU(3) Landau gauge lattice gluodynamicsReceived 8 June 2005; published 29 July 2005 We study the behavior of the gluon and ghost dressing functions in SU(3) Landau gauge at low momenta available on lattice sizes 124–324 at β=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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.72.014507
DOI:
10.1103/PhysRevD.72.014507
PACS:
11.15.Ha, 12.38.Aw, 12.38.Gc
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