QCD thermodynamics with effective models

Details QCD thermodynamics with effective models QCD thermodynamics with effective models

2009-09-01

arxiv.org/abs/0909.0289v2

PoS (CPOD 2009) 017

Physics

High Energy Physics

High Energy Physics - Phenomenology

[references added]; 10 pages, 5 figures, talk given at the workshop CPOD 2009, June 08 - 12, BNL, USA

Scientific paper

In this talk we extend the Polyakov-quark-meson model to N_f=2+1 quark flavors and study its bulk thermodynamics at finite temperatures in mean-field approximation. Three different Polyakov-loop potentials are considered. Our findings are confronted to recent QCD lattice simulations of the RBC-Bielefeld and HotQCD collaborations. Furthermore, the finite chemical potential expansion of the quark-number susceptibility in a Taylor series around vanishing chemical potential is analyzed. By means of a novel algorithmic differentiation technique, we have calculated Taylor coefficients up to 24th order in the model for the first time. This allows the systematic study of convergence properties of the Taylor series.

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