The generalised infrared structure of the gluon propagator

• DOI: 10.1016/j.physletb.2020.135329
• Publication Date: 2020-02-25T00:05:52Z
• Authors: Shirley Weishi Li; Peter Lowdon; Orlando Oliveira; Paulo J. Silva
• Keywords: Propagator; Lattice gauge theory; Mass gap; Yang–Mills theory; Lattice (music); Color confinement

Gauge theory correlators are potentially more singular in the infrared than those non-gauge theories. We determine implications that these singularities have on spectrum of theory, proving appearance generalised poles implies existence on-shell states with fixed mass, but zero norm. For quantum chromodynamics direct relevance for confinement coloured states. Using lattice data Landau gauge gluon propagator we subsequently test presence poles, establishing is indeed consistent such a component.