Heavy quark bound states above deconfinement

TL;DR

This paper investigates the properties of heavy quark bound states in the quark-gluon plasma above the deconfinement temperature using nonperturbative potentials and screening effects, providing insights into their stability and disintegration.

Contribution

It introduces a comprehensive analysis of heavy quark states above T_c using the Field Correlator Method and screened Coulomb potentials, calculating binding energies and melting points.

Findings

Heavy quark states remain bound above T_c under certain conditions.

Calculated melting temperatures for heavy mesons and baryons.

Estimated disintegration cross sections for J/ψ and Upsilon.

Abstract

A comprehensive study of the color singlet heavy quark states above T_c is given, using the Field Correlator Method (FCM) for nonperturbative Q{\bar Q} potentials and the screened Coulomb potential with the T-dependent Debye radius. Using these potentials we calculate binding energies and melting temperatures of heavy mesons and baryons in the deconfined phase of quark-gluon plasma and the J/\psi and Upsilon disintegration cross sections via the gluon absorption.