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

Abstract

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.

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

References in corpus (9)

• The Phase Structure of the Polyakov--Quark-Meson Model
• Susceptibilities and the Phase Structure of a Chiral Model with Polyakov Loops
• Inhomogeneous phases in the Nambu-Jona-Lasino and quark-meson model
• Susceptibilities near the QCD (tri)critical point
• Dynamic universality class of the QCD critical point
• 2+1 Flavor Polyakov--Nambu--Jona-Lasinio Model at Finite Temperature and Nonzero Chemical Potential
• Three flavor Nambu-Jona Lasinio model with Polyakov loop and competition with nuclear matter
• QCD Thermodynamics from the Lattice
• Chiral Symmetry and Heavy-Ion Collisions

Cited by in corpus (2)

• Extensions and further applications of the nonlocal Polyakov--Nambu--Jona-Lasinio model
• Particle Production in s_NN = 2.76 TeV Heavy Ion Collisions