Gluons at finite temperature

TL;DR

This paper investigates the behavior of the gluon propagator at finite temperature using lattice simulations, analyzing its spectral properties, positivity violation, and dependence on the Polyakov loop phase.

Contribution

It provides new insights into the spectral density and phase dependence of the gluon propagator at finite temperature through lattice computations.

Findings

Gluon propagator exhibits massive-like behavior at finite temperature

Spectral density shows violation of spectral positivity

Gluon propagator depends on the Polyakov loop phase

Abstract

The gluon propagator is investigated at finite temperature via lattice simulations. In particular, we discuss its interpretation as a massive-type bosonic propagator. Moreover, we compute the corresponding spectral density and study the violation of spectral positivity. Finally, we explore the dependence of the gluon propagator on the phase of the Polyakov loop.