The gluon and ghost propagator and the influence of Gribov copies
A. Sternbeck, E.-M. Ilgenfritz, M. Mueller-Preussker, A. Schiller
TL;DR
This paper investigates how Gribov copies affect the Landau gauge gluon and ghost propagators in SU(3) lattice gauge theory, revealing minimal impact on gluons but significant effects on ghosts in the infrared, and compares results with Dyson-Schwinger predictions.
Contribution
It provides a detailed lattice study of Gribov copy effects on propagators and compares findings with Dyson-Schwinger equation predictions, highlighting differences in infrared behavior.
Findings
Ghost propagator is significantly affected by Gribov copies in the infrared.
Gluon propagator shows minimal dependence on Gribov copies.
Results are compared with Dyson-Schwinger equation predictions.
Abstract
The dependence of the Landau gauge gluon and ghost propagators on the choice of Gribov copies is studied in pure SU(3) lattice gauge theory. Whereas the influence on the gluon propagator is small, the ghost propagator becomes clearly affected by the copies in the infrared region. We compare our data with the infrared exponents predicted by the Dyson-Schwinger equation approach
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