The influence of Gribov copies on the gluon and ghost propagator
A. Sternbeck, E.-M. Ilgenfritz, M. Mueller-Preussker, A. Schiller
TL;DR
This study investigates how Gribov copies affect the gluon and ghost propagators in pure SU(3) gauge theory, revealing that the ghost propagator is sensitive to the choice of copies, especially in the infrared region.
Contribution
It provides a detailed lattice simulation analysis of Gribov copy effects on propagators and the Faddeev-Popov operator eigenvalues in Landau gauge.
Findings
Ghost propagator depends on Gribov copies in the infrared
Gluon propagator impact from Gribov copies is not clearly resolvable
Eigenvalue distribution of Faddeev-Popov operator is sensitive to Gribov copies
Abstract
The dependence of the gluon and ghost propagator in pure SU(3) gauge theory on the choice of Gribov copies in Landau gauge is studied. Simulations were performed on several lattice sizes at =5.8, 6.0 and 6.2. In the infrared region the ghost propagator turns out to depend on the choice, while the impact on the gluon propagator is not resolvable. Also the eigenvalue distribution of the Faddeev-Popov operator is sensitive to Gribov copies.
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