Exploring the chiral and deconfinement phase transitions in a self-consistent PNJL model

2023/06/21 by Xiaozhu Yu, Liangkai Wu, Yu, Xiaozhu +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Quantum, superfluid, helium dynamics #Spectroscopy and Quantum Chemical Studies

paper · pdf · doi:10.48550/arxiv.2306.12036

openalex publication_date 2023/06/21 · openalex created_date 2023/06/24 · openalex updated_date 2026/07/28

Abstract

In this work, we study the chiral and deconfinement phase transitions in a two-flavor Polyakov loop extended Nambu--Jona-Lasinio (PNJL) model. And note that the self-consistent mean field approximation is employed by introducing an arbitrary parameter α to measure the weights of the Fierz-transformed interaction channels. By making use of this model, we systematically investigate the chiral and deconfinement phase transition lines (as well as the chiral ones in the NJL model for comparison) under different values of α. It is found that, the increasing of α helps to enhance the chiral (pseudo)critical temperature at fixed chemical potential, and also to enhance the chiral (pseudo)critical chemical potential at fixed temperature. And the critical end point (CEP) vanishes when α becomes large enough. Besides, we find that the incorporation of Polyakov loop increases T_CEP but does not change μ_CEP for small values of α.

Related

• Probing deconfinement in the Polyakov-loop extended Nambu-Jona-Lasinio model at imaginary chemical potential
• Phase diagram and thermodynamics of the PNJL model
• Fluctuations and the Phase Transition in a Chiral Model with Polyakov Loops
• Reduction of (pseudo-)Critical Temperatures of Chiral Restoration and Deconfinement Phase Transitions in a Magnetized PNJL Model
• Thermodynamics of PNJL at zero temperature in a strong magnetic field