What is the Quark-Gluon Plasma made of?
Abstract
This article surveys our present understanding of the internal structure of the fully developed quark-gluon plasma at temperatures outside the crossover region. The theoretical part of the review covers perturbative and nonperturbative approaches to quark-gluon plasma structure, in particular, hard-thermal loop effective theory, lattice QCD and the functional renormalization group. The phenomenological part of the review scrutinizes the information that has been derived from bulk observables and hard probes in relativistic heavy ion collisions in terms of how it informs our knowledge about the structure of the quark-gluon plasma. The final section lists possible avenues for future progress.
Keywords
Cite
@article{arxiv.2506.07181,
title = {What is the Quark-Gluon Plasma made of?},
author = {Berndt Müller},
journal= {arXiv preprint arXiv:2506.07181},
year = {2025}
}
Comments
To appear in the book (edited volume) {\it Quark Gluon Plasma at Fifty: A Commemorative Review}