Bulk viscous corrections to screening and damping in QCD at high temperatures

Authors

Qianqian Du, Guangxi Normal University
Adrian Dumitru, CUNY Bernard M Baruch CollegeFollow
Yun Guo, Guangxi Normal University
Michael Strickland, Kent State University

Document Type

Article

Publication Date

2017

Abstract

Non-equilibrium corrections to the distribution functions of quarks and gluons in a hot and dense QCD medium modify the “hard thermal loops” (HTL). The HTLs determine the retarded, advanced, and symmetric (time-ordered) propagators for gluons with soft momenta as well as the Debye screening and Landau damping mass scales. We compute such corrections to a thermal as well as to a non-thermal fixed point. The screening and damping mass scales are sensitive to the bulk pressure and hence to (pseudo-) critical dynamical scaling of the bulk viscosity in the vicinity of a second-order critical point. This could be reflected in the properties of quarkonium bound states in the deconfined phase and in the dynamics of soft gluon fields.

Comments

This article was originally published in Journal of High Energy Physics, available at http://dx.doi.org/10.1007/JHEP01(2017)123

This work is distributed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).