On the IR behaviour of the Landau-gauge ghost propagator
High Energy Physics - Phenomenology
2010-03-19 v1
Abstract
We examine analytically the ghost propagator Dyson-Schwinger Equation (DSE) in the deep IR regime and prove that a finite ghost dressing function at vanishing momentum is an alternative solution (solution II) to the usually assumed divergent one (solution I). We furthermore find that the Slavnov-Taylor identities discriminate between these two classes of solutions and strongly support the solution II. The latter turns out to be also preferred by lattice simulations within numerical uncertainties.
Keywords
Cite
@article{arxiv.0803.2161,
title = {On the IR behaviour of the Landau-gauge ghost propagator},
author = {Ph. Boucaud and J. P. Leroy and A. Le Yaouanc and J. Micheli and O. Pène and J. Rodríguez-Quintero},
journal= {arXiv preprint arXiv:0803.2161},
year = {2010}
}
Comments
15 pages, Axodraw needed