A model for QCD ground state with magnetic disorder

TL;DR

This paper proposes a model for the QCD ground state incorporating magnetic monopole disorder, explaining confinement and propagator behaviors through long-range correlations and monopole interactions.

Contribution

It introduces a Coulomb gauge ansatz with monopole gas to account for magnetic disorder effects in the QCD vacuum, linking monopole interactions to confinement phenomena.

Findings

Wilson loop area law from magnetic disorder

Suppression of gluon propagator at low momenta

Enhancement of ghost propagator at low momenta

Abstract

We explore an ansatz for the QCD vacuum in the Coulomb gauge that describes gauge field fluctuations in presence of a weakly interacting gas of abelian monopoles. Such magnetic disorder leads to long-range correlations which are manifested through the area law for the Wilson loop. In particular we focus on the role of the residual monopole-monopole interactions in providing the mechanism for suppression of the gluon propagator at low-momenta which also leads to low momentum enhancement in the ghost propagator.