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.
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ArXiv ePrint: 1611.08379
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Du, Q., Dumitru, A., Guo, Y. et al. Bulk viscous corrections to screening and damping in QCD at high temperatures. J. High Energ. Phys. 2017, 123 (2017). https://doi.org/10.1007/JHEP01(2017)123
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DOI: https://doi.org/10.1007/JHEP01(2017)123