Effects of the mean field on fluid dynamics in the relaxation time approximation
Nuclear Theory
2020-04-28 v1
Abstract
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 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.
Keywords
Cite
@article{arxiv.2004.11920,
title = {Effects of the mean field on fluid dynamics in the relaxation time approximation},
author = {Alina Czajka and Sigtryggur Hauksson and Chun Shen and Sangyong Jeon and Charles Gale},
journal= {arXiv preprint arXiv:2004.11920},
year = {2020}
}
Comments
6 pages, to appear as proceedings of Excited QCD 2020 conference