Equation of state in the PNJL model with the entanglement interaction

Yuji Sakai, Takahiro Sasaki, Hiroaki Kouno, Masanobu Yahiro

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The equation of state and the phase diagram in two-flavor quantum chromodynamics (QCD) are investigated by the Polyakov-loop extended NambuJona-Lasinio (PNJL) model with an entanglement vertex between the chiral condensate and the Polyakov loop. The entanglement-PNJL (EPNJL) model reproduces lattice QCD (LQCD) data at 0 better than the PNJL model. Hadronic degrees of freedom are taken into account by the free-hadron-gas approximation with the volume-exclusion effect due to the hadron generation. The hadron degrees of freedom improve agreement of the EPNJL model with LQCD data particularly at low temperature. The quarkyonic phase survives, even if the correlation between the chiral condensate and the Polyakov loop is strong and hadron degrees of freedom are taken into account. However, the location of the quarkyonic phase is sensitive to the strength of the volume exclusion.

Original languageEnglish
Article number035004
JournalJournal of Physics G: Nuclear and Particle Physics
Volume39
Issue number3
DOIs
Publication statusPublished - Mar 2012

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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