Lattice results on gluon and ghost propagators in Landau gauge

TL;DR

This paper demonstrates that a new gauge fixing approach significantly reduces finite-volume effects and reveals strong influences of Gribov copies on gluon and ghost propagators in Landau gauge lattice simulations.

Contribution

The study introduces a novel Landau gauge fixing method that minimizes finite-volume effects and clarifies the impact of Gribov copies on propagator calculations.

Findings

New gauge fixing reduces finite-volume effects

Strong effects of Gribov copies on propagators

Improved lattice results at small momenta

Abstract

We present clear evidence of strong effects of Gribov copies in Landau gauge gluon and ghost propagators computed on the lattice at small momenta by employing a new approach to Landau gauge fixing and a more effective numerical algorithm. It is further shown that the new approach substantially decreases notorious finite-volume effects.