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.

19 pages. no figure, added corrections of quadratic order in the bulk pressure to the symmetric gluon self energy, to appear in JHEP

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Cited by in corpus (8)

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• Spectral functions of heavy quarkonia in a bulk-viscous quark gluon plasma
• Renormalization of the 4PI effective action using the functional renormalization group
• Heavy quarkonia in QGP medium in an arbitrary magnetic field
• Effective Debye Screening Mass in an Anisotropic Quark Gluon Plasma
• Real-time hard-thermal-loop gluon self-energy in a semiquark-gluon plasma
• Quarkonium in a bulk viscous QGP medium
• Quarkonium in a QCD medium with momentum-dependent relaxation time