Phase diagram and critical properties in the Polyakov--Nambu--Jona-Lasinio model

Details Phase diagram and critical properties in the Polyakov--Nambu--Jona-Lasinio model Phase diagram and critical properties in the Polyakov--Nambu--Jona-Lasinio model

2010-11-25

arxiv.org/abs/1011.5601v1

AIP Conf.Proc.1343:592,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at the 9th International Conference on Quark Confinement and the Hadron Spectrum - QCHS IX, Madrid, Spain, 30 Augus

Scientific paper

10.1063/1.3575104

We investigate the phase diagram of the so-called Polyakov--Nambu--Jona-Lasinio model at finite temperature and nonzero chemical potential with three quark flavours. Chiral and deconfinement phase transitions are discussed, and the relevant order-like parameters are analyzed. The results are compared with simple thermodynamic expectations and lattice data. A special attention is payed to the critical end point: as the strength of the flavour-mixing interaction becomes weaker, the critical end point moves to low temperatures and can even disappear.

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