2+1 flavor Polyakov-Nambu-Jona-Lasinio model at finite temperature and nonzero chemical potential

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.014006· OSTI ID:21035689

Weijie, Fu ^[1]; Zhao, Zhang ^[1]; Yuxin, Liu ^[1]

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1. Department of Physics, Peking University, Beijing 100871 (China)

We extend the Polyakov-loop improved Nambu-Jona-Lasinio model to 2+1 flavor case to study the chiral and deconfinement transitions of strongly interacting matter at finite temperature and nonzero chemical potential. The Polyakov loop, the chiral susceptibility of light quarks (u and d), and the strange quark number susceptibility as functions of temperature at zero chemical potential are determined and compared with the recent results of lattice QCD simulations. We find that there is always an inflection point in the curve of strange quark number susceptibility accompanying the appearance of the deconfinement phase, which is consistent with the result of lattice QCD simulations. Predictions for the case at nonzero chemical potential and finite temperature are made as well. We give the phase diagram in terms of the chemical potential and temperature and find that the critical end point moves down to low temperature and finally disappears with the decrease of the strength of the 't Hooft flavor-mixing interaction.

• OSTI ID: 21035689
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRALITY
COMPUTERIZED SIMULATION
D QUARKS
FLAVOR MODEL
LATTICE FIELD THEORY
PHASE DIAGRAMS
POTENTIALS
QUANTUM CHROMODYNAMICS
S QUARKS
STRONG INTERACTIONS
TEMPERATURE DEPENDENCE
U QUARKS