Phase diagram of hot and dense QCD constrained by the Statistical Model

Details Phase diagram of hot and dense QCD constrained by the Statistical Model Phase diagram of hot and dense QCD constrained by the Statistical Model

2010-06-14

arxiv.org/abs/1006.2596v2

Phys.Lett.B695:387-391,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 3 figures; all figures updated, results and conclusions not modified

Scientific paper

10.1016/j.physletb.2010.11.040

We propose a prescription to constrain the chiral effective model approach to the QCD phase diagram using the thermal Statistical Model, which is a description consistent with the experimental data at the freeze-out. In the transition region where thermal quantities of hadrons blow up, deconfined quarks and gluons should smoothly take over the degrees of freedom from hadrons in the Statistical Model. We use the Polyakov-loop coupled Nambu--Jona-Lasinio (PNJL) model as an effective description in the quark side. We require that the validity regions of these descriptions should have an overlap on the phase diagram, which constrains model uncertainty. Our results favor a phase diagram with the chiral phase transition located at slightly higher temperature than deconfinement.

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