The Gluon Propagator without lattice Gribov copies

摘要

We study the gluon propagator on the lattice using the Laplacian gauge which is free of lattice Gribov copies. We compare our results with those obtained in the Landau gauge on the lattice, as well as with various approximate solutions of the Dyson Schwinger equations. We find a finite value $\sim (250 \rm{MeV})^{-2}$ for the zero-momentum propagator, and a pole mass $\sim 640 \pm 110$ MeV.