Isentropic thermodynamics in the PNJL model

Details Isentropic thermodynamics in the PNJL model Isentropic thermodynamics in the PNJL model

2009-01-07

arxiv.org/abs/0901.0783v1

Phys.Rev.D79:074015,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 9 figures

Scientific paper

10.1103/PhysRevD.79.074015

We discuss the isentropic trajectories on the QCD phase diagram in the temperature and the quark chemical potential plane using the Nambu--Jona-Lasinio model with the Polyakov loop coupling (PNJL model). We impose a constraint on the strange quark chemical potential so that the strange quark density is zero, which is the case in the ultra relativistic heavy-ion collisions. We compare our numerical results with the truncated estimates by the Taylor expansion in terms of the chemical potential to quantify the reliability of the expansion used in the lattice QCD simulation. We finally discuss the strange quark chemical potential induced by the strangeness neutrality condition and relate it to the ratio of the Polyakov loop and the anti-Polyakov loop.

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