A comparative study on two different expressions of Bulk viscosity in the PNJL model
High Energy Physics - Phenomenology
2017-01-10 v2
Abstract
We have gone through a comparative study on two different kind of bulk viscosity expressions by using a common dynamical model. The Polyakov-Nambu-Jona-Lasinio (PNJL) model in the realm of mean-field approximation, including up to eight quark interactions for 2+1 flavor quark matter, is treated for this common dynamics. We have probed the numerical equivalence as well as discrepancy of two different expressions for bulk viscosity at vanishing quark chemical potential. Our estimation of bulk viscosity to entropy density ratio follows a decreasing trend with temperature, which is observed in most of the earlier investigations. We have also extended our estimation for finite values of quark chemical potential.
Keywords
Cite
@article{arxiv.1505.00177,
title = {A comparative study on two different expressions of Bulk viscosity in the PNJL model},
author = {Kinkar Saha and Sudipa Upadhaya and Sabyasachi Ghosh},
journal= {arXiv preprint arXiv:1505.00177},
year = {2017}
}
Comments
13 pages, 4 figures