The generalised infrared structure of the gluon propagator
High Energy Physics - Theory
2020-02-28 v2 High Energy Physics - Lattice
High Energy Physics - Phenomenology
Abstract
Gauge theory correlators are potentially more singular in the infrared than those in non-gauge theories. We determine the implications that these singularities have on the spectrum of the theory, proving that the appearance of generalised poles implies the existence of on-shell states with fixed mass, but zero norm. For quantum chromodynamics these poles have direct relevance for the confinement of coloured states. Using lattice data for the Landau gauge gluon propagator we subsequently test for the presence of these poles, establishing that the data is indeed consistent with such a component.
Cite
@article{arxiv.1907.10073,
title = {The generalised infrared structure of the gluon propagator},
author = {Shirley Weishi Li and Peter Lowdon and Orlando Oliveira and Paulo J. Silva},
journal= {arXiv preprint arXiv:1907.10073},
year = {2020}
}
Comments
12 pages, 2 figures; v2: additional comments and figure added, matches published version