Quasiparticle description of the hot and dense quark-gluon plasma

Abstract

The collective modes of QCD at temperatures and densities above its phase-transition are analyzed for isotropic systems as well as for systems having an anisotropy in momentum-space using the HTL approximation. For isotropic systems, results for the thermodynamic pressure and entropy at finite densities based on a phenomenological description of lattice calculations at vanishing densities are derived and compared to those following from different methods. From the resulting equation of state the mass-radius relationship of so-called quark-stars and other applications are investigated. It is shown that systems with anisotropic momentum-space distributions contain unstable modes in addition to the stable quasiparticle modes, which may be of great importance for the dynamical evolution of an incompletely thermalized quark-gluon plasma. Finally, the effects of the anisotropy on the collisional energy loss are studied.

arXiv commentPhD thesis: 115 pages, 53 figures; v2: minor changes, references updated

Cited by in corpus (6)

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• Jet quenching and broadening: the transport coefficient $\hat{q}$ in an anisotropic plasma
• Thermodynamics of Quasi-Particles at Finite Chemical Potential
• Collective Phenomena in the Non-Equilibrium Quark-Gluon Plasma
• On SU(3) effective models and chiral phase-transition