Bulk viscous corrections to screening and damping in QCD at high temperatures
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.
Keywords
Cite
@article{arxiv.1611.08379,
title = {Bulk viscous corrections to screening and damping in QCD at high temperatures},
author = {Qianqian Du and Adrian Dumitru and Yun Guo and Michael Strickland},
journal= {arXiv preprint arXiv:1611.08379},
year = {2017}
}
Comments
19 pages. no figure, added corrections of quadratic order in the bulk pressure to the symmetric gluon self energy, to appear in JHEP