Including the Fermion Vacuum Fluctuations in the $(2+1)$ flavor Polyakov Quark Meson Model

Details Including the Fermion Vacuum Fluctuations in the $(2+1)$ flavor Polyakov Quark Meson Model Including the Fermion Vacuum Fluctuations in the $(2+1)$ flavor Polyakov Quark Meson Model

2011-08-15

arxiv.org/abs/1108.2941v3

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 figures, some parts rewritten, new figures added

Scientific paper

We consider the $(2+1)$ flavor Polyakov Quark Meson Model and study the effect of including fermion vacuum fluctuations on the thermodynamics and phase diagram. The resulting model predictions are compared to the recent QCD lattice simulations by the HotQCD and Wuppertal-Budapest collaborations. The variation of the thermodynamic quantities across the phase transition region becomes smoother. This results in better agreement with the lattice data. Depending on the value of the mass of the sigma meson, including the vacuum term results in either pushing the critical end point into higher values of the chemical potential or excluding the possibility of a critical end point altogether.

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