Collective excitations in the hot QCD medium and the propagation of Heavy Quarks

TL;DR

This review summarizes the current understanding of collective excitations and heavy quark dynamics in the quark-gluon plasma, emphasizing theoretical models, collective behaviors, and experimental tests in relativistic heavy-ion collisions.

Contribution

It provides a comprehensive overview of theoretical approaches to collective excitations and heavy quark propagation in the QGP, including new insights into energy loss and gain mechanisms.

Findings

Analysis of polarization energy loss mechanisms

Discussion of energy gain due to thermal fluctuations

Implications for experimental detection of QGP properties

Abstract

This review explores the current understanding of collective excitations and the dynamics of heavy quark propagation in the quark-gluon plasma (QGP) formed in relativistic heavy-ion collisions. We focus on three core aspects: the theoretical modelling of the QGP, including momentum anisotropy, medium-induced collisions, finite chemical potential, and non-ideal interactions; the collective behaviours within the plasma; and the interaction dynamics of heavy quarks as they traverse the medium. Along with the polarization energy loss mechanisms, we also review the possibility of energy gain due to thermal field fluctuations. Lastly, we discuss how these theoretical insights can be tested through experiments and outline possible directions for future research.