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HK: Fachverband Physik der Hadronen und Kerne
HK 14: Theorie
HK 14.4: Vortrag
Dienstag, 13. März 2007, 15:00–15:15, C
Susceptibilites and the Phasestructure of a Chiral Model with Polyakov loops — •Chihiro Sasaki1, Bengt Friman1, and Krzysztof Redlich1,2 — 1GSI, Planckstr. 1, 64291 Darmstadt — 2Institute of Theoretical Physics, University of Wroclaw, PL-50204 Wroclaw, Poland
We explore the relation between the deconfinement and chiral phase transitions in an extension of the Nambu-Jona-Lasinio model, where the quarks interact with the temporal gluon field, represented by the Polyakov loop. The effect of Polyakov loop dynamics on thermodynamic quantities, on the phase structure at finite temperature and baryon density and on various susceptibilities is presented. Particular emphasis is put on the behavior and properties of the fluctuations of the (approximate) order parameters and their dependence on temperature and net–quark number density. We also discuss how the phase structure of the model is influenced by the coupling of the quarks to the Polyakov loop.