Quark Gas at High Temperature: Finite-Volume Effects
arXiv:2410.11393
Abstract
It is shown that the textbook formula for the pressure of free massless fermions leads to negative values of the probability mass function of the distribution of the system of free massless fermions in the fermion number. The ways to resolve this paradox are proposed. A detailed analysis of the corresponding partition function indicates the presence of a Roberge-Weiss transition in the absence of strong interactions.
7 pages, 5 figures, to be published in "Physics of Particles and Nuclei"