We study the SU(3) gluon propagator in renormalizable Rξ gauges implemented on a symmetric lattice with a total volume of (3.25 fm)4 for values of the guage fixing parameter up to ξ=0.5. As expected, the longitudinal gluon dressing function stays constant at its tree-level value ξ. Similar to the Landau gauge, the transverse Rξ gauge gluon propagator saturates at a non-vanishing value in the deep infrared for all values of ξ studied. We compare with very recent continuum studies and perform a simple analysis of the found saturation with a dynamically generated effective gluon mass.
@article{arxiv.1505.05897,
title = {The lattice gluon propagator in renormalizable $\xi$ gauges},
author = {P. Bicudo and D. Binosi and N. Cardoso and O. Oliveira and P. J. Silva},
journal= {arXiv preprint arXiv:1505.05897},
year = {2016}
}