Effects of the mean field on fluid dynamics in the relaxation time approximation

Autor:	Czajka, Alina, Hauksson, Sigtryggur, Shen, Chun, Jeon, Sangyong, Gale, Charles
Rok vydání:	2020
Předmět:	Nuclear Theory
Druh dokumentu:	Working Paper
Popis:	In this paper the nonequilibrium correction to the distribution function containing a time and space dependent mass is obtained. Given that, fully consistent fluid dynamic equations are formulated. Then, the physics of the bulk viscosity is elaborated for Boltzmann and Bose-Einstein gases within the relaxation time approximation. It is found that the parametric form of the ratio $\zeta/\tau_R$ for the quantum gas is affected by the infrared cut-off. This may be an indication that the relaxation time approximation is too crude to obtain a reliable form of bulk viscosity. Comment: 6 pages, to appear as proceedings of Excited QCD 2020 conference
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2004.11920 Zobrazit plný text záznamu View this record from Arxiv