Zero mode contribution in quarkonium correlators and in-medium properties of heavy quarks

TL;DR

This paper investigates the low energy contributions to quarkonium correlators in lattice QCD, demonstrating their dominant role in temperature dependence and modeling them with a quasi-particle approach to determine effective heavy quark masses.

Contribution

It introduces a quasi-particle model to accurately describe low energy contributions in quarkonium correlators and determines temperature-dependent heavy quark masses.

Findings

Low energy contributions dominate the temperature dependence of correlators.

A quasi-particle model effectively describes these contributions.

Effective heavy quark masses are extracted as functions of temperature.

Abstract

We calculate the low energy contribution to quarkonium correlators in Euclidean time in lattice QCD. This contribution was found to give the dominant source of the temperature dependence of the correlators. We have found that the low energy contribution is well described by a quasi-particle model and have determined the effective temperature dependent heavy quark mass.