Gluon mass through massless bound-state excitations
Abstract
Recent large-volume lattice simulations have established that, in the Landau gauge, the gluon propagator is infrared-finite. The most natural way to explain this observed finiteness is the generation of a nonperturbative, momentum-dependent gluon mass. Such a mass may be generated gauge-invariantly by employing the Schwinger mechanism, whose main assumption is the dynamical formation of massless bound-state excitations. In this work we demonstrate that this key assumption is indeed realized by the QCD dynamics. Specifically, the Bethe-Salpeter equation describing the aforementioned massless excitations is derived and solved under certain approximations, and non-trivial solutions are obtained.
Cite
@article{arxiv.1208.4981,
title = {Gluon mass through massless bound-state excitations},
author = {David Ibanez},
journal= {arXiv preprint arXiv:1208.4981},
year = {2012}
}
Comments
Contribution to the International Meeting "Excited QCD", Peniche, Portugal, 06 - 12 May 2012. 6 pages, 3 figures