QCD thermodynamics and confinement from a dynamical quasiparticle point of view

Details QCD thermodynamics and confinement from a dynamical quasiparticle point of view QCD thermodynamics and confinement from a dynamical quasiparticle point of view

2007-04-11

arxiv.org/abs/0704.1410v1

Nucl.Phys.A791:365-381,2007

Physics

Nuclear Physics

Nuclear Theory

21 pages, 8 figures, submitted to Nucl. Phys. A

Scientific paper

10.1016/j.nuclphysa.2007.04.015

In this study it is demonstrated that a simple picture of the QCD gluon liquid emerges in the dynamical quasiparticle model that specifies the active degrees of freedom in the time-like sector and yields a potential energy density in the space-like sector. By using the time-like gluon density (or scalar gluon density) as an independent degree of freedom - instead of the temperature $T$ as a Lagrange parameter - variations of the potential energy density lead to effective mean-fields for time-like gluons and an effective gluon-gluon interaction strength at low density. The latter yields a simple dynamical picture for the gluon fusion to color neutral glueballs when approaching the phase boundary from a temperature higher than $T_c$ and paves the way for an off-shell transport theoretical description of the parton dynamics.

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