Non-perturbative contribution to the Polyakov loop above the deconfinement phase transition

TL;DR

This paper investigates the non-perturbative effects on the Polyakov loop above the deconfinement transition, highlighting the role of a dimension two gluon condensate in lattice data and phenomenological models.

Contribution

It introduces a model incorporating a dimension two gluon condensate to explain inverse power temperature corrections in the Polyakov loop above the deconfinement transition.

Findings

Inverse power temperature corrections driven by gluon condensate

Agreement between model and lattice data for Polyakov loop

Analysis of heavy quark free energy in the deconfined phase

Abstract

The Polyakov loop is an order parameter to the confinement-deconfinement phase transition in pure gluodynamics. Recently a simple phenomenological model has been proposed to describe the available lattice data for the renormalized Polyakov loop in the deconfinement phase (hep-ph/0505215). These data exhibit unequivocal inverse power temperature corrections driven by a dimension two gluon condensate. The heavy quark free energy is also studied and compared to lattice data.