QCD phase diagram at finite baryon and isospin chemical potentials

Details QCD phase diagram at finite baryon and isospin chemical potentials QCD phase diagram at finite baryon and isospin chemical potentials

2010-05-06

arxiv.org/abs/1005.0910v3

Phys.Rev.D82:116004,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 24 figures, published version, references added

Scientific paper

10.1103/PhysRevD.82.116004

The phase structure of two-flavor QCD is explored for thermal systems with finite baryon- and isospin-chemical potentials, mu_B and mu_{iso}, by using the Polyakov-loop extended Nambu--Jona-Lasinio (PNJL) model. The PNJL model with the scalar-type eight-quark interaction can reproduce lattice QCD data at not only mu_{iso}=mu_B=0 but also mu_{iso}>0 and mu_B=0. In the mu_{iso}-mu_{B}-T space, where T is temperature, the critical endpoint of the chiral phase transition in the mu_B-T plane at mu_{iso}=0 moves to the tricritical point of the pion-superfluidity phase transition in the mu_{iso}-T plane at mu_B=0 as mu_{iso} increases. The thermodynamics at small T is controlled by sqrt{sigma^2+pi^2} defined by the chiral and pion condensates, sigma and pi.

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