Gauge fixing methods and Gribov copies effects in lattice QCD

Abstract

We compare two Landau gauge fixing methods, aiming to find the global maximum of the gauge fixing functional. Moreover, a systematic effect of Gribov copies in the gluon and ghost propagators computed in Landau gauge is presented and discussed.

7 pages, 3 figures, poster presented at Lattice 2007 (Vacuum structure and confinement)