QCD phase diagram at finite baryon and isospin chemical potentials

Takahiro Sasaki, Yuji Sakai, Hiroaki Kouno, Masanobu Yahiro

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

The phase structure of two-flavor QCD is explored for thermal systems with finite baryon- and isospin-chemical potentials, μB and μiso, 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 μisoB=0, but also μiso>0 and μB=0. In the μisoB-T space, where T is temperature, the critical endpoint of the chiral phase transition in the μB-T plane at μiso=0 moves to the tricritical point of the pion-superfluidity phase transition in the μiso-T plane at μB=0 as μiso increases. The thermodynamics at small T is controlled by √σ2+π2 defined by the chiral and pion condensates, σ and π.

Original languageEnglish
Article number116004
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume82
Issue number11
DOIs
Publication statusPublished - Dec 3 2010

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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