Thermodynamics of the PNJL model

Details Thermodynamics of the PNJL model Thermodynamics of the PNJL model

2006-09-21

arxiv.org/abs/hep-ph/0609218v1

Eur.Phys.J.C49:213-217,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 5 figures, Talk given at the Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus-Nucleus Collis

Scientific paper

10.1140/epjc/s10052-006-0065-x

QCD thermodynamics is investigated by means of the Polyakov-loop-extended Nambu Jona-Lasinio (PNJL) model, in which quarks couple simultaneously to the chiral condensate and to a background temporal gauge field representing Polyakov loop dynamics. The behaviour of the Polyakov loop as a function of temperature is obtained by minimizing the thermodynamic potential of the system. A Taylor series expansion of the pressure is performed. Pressure difference and quark number density are then evaluated up to sixth order in quark chemical potential, and compared to the corresponding lattice data. The validity of the Taylor expansion is discussed within our model, through a comparison between the full results and the truncated ones.

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