Hadronic and electromagnetic probes of hot and dense nuclear matter

Relativistic transport approach for nucleus-nucleus collisions from SIS to SPS energies☆☆☆

http://www.t39.ph.tum.de/T39_files/Publications_files/preprints/0712.3152.pdf

The chiral and deconfinement crossover transitions: PNJL model beyond mean field

A nonlocal covariant extension of the two-flavor Nambu and Jona-Lasinio model is constructed, with built-in constraints from the running coupling of QCD at high-momentum and instanton physics at low-momentum scales. Chiral low-energy theorems and basic current algebra relations involving pion properties are shown to be reproduced. The momentum-dependent dynamical quark mass derived from this approach is in agreement with results from Dyson-Schwinger equations and lattice QCD. At finite temperature, inclusion of the Polyakov loop and its gauge invariant coupling to quarks reproduces the dynamical entanglement of the chiral and deconfinement crossover transitions as in the (local) Polyakov-loop-extended Nambu and Jona-Lasinio model, but now without the requirement of introducing an artificial momentum cutoff. Steps beyond the mean-field approximation are made including mesonic correlations through quark-antiquark ring summations. Various quantities of interest (pressure, energy density, speed of sound, etc.) are calculated and discussed in comparison with lattice QCD thermodynamics at zero chemical potential. The extension to finite quark chemical potential and the phase diagram in the (T,{mu})-plane are also discussed.

Dynamics and thermodynamics of a nonlocal Polyakov--Nambu--Jona-Lasinio model with running coupling

http://www.ift.uni.wroc.pl/~blaschke/maestro/B+AnnPhys2014.pdf

H. Voss

Papers

Thermodynamics of a Quark Plasma Beyond the Mean Field: A Generalized Beth-Uhlenbeck Approach