The low-momentum ghost dressing function and the gluon mass
High Energy Physics - Phenomenology
2016-08-14 v1
Abstract
We study the low-momentum ghost propagator Dyson-Schwinger equation (DSE) in Landau gauge, assuming for the truncation a constant ghost-gluon vertex, as it is extensively done, and a simple model for a massive gluon propagator. Then, regular DSE solutions (the zero-momentum ghost dressing function not diverging) appear to emerge and we show the ghost propagator to be described by an asymptotic expression reliable up to the order . That expression, depending on the gluon mass and the zero-momentum Taylor-scheme effective charge, is proven to fit pretty well the low-momentum ghost propagator obtained through big-volume lattice simulations.
Cite
@article{arxiv.1004.4135,
title = {The low-momentum ghost dressing function and the gluon mass},
author = {Ph. Boucaud and M. E. Gómez and J. P. Leroy and A. Le Yaouanc and J. Micheli and O. Pène and J. Rodríguez-Quintero},
journal= {arXiv preprint arXiv:1004.4135},
year = {2016}
}
Comments
11 pages, 1 fig.