SU(3) Polyakov Linear-Sigma Model With Finite Isospin Asymmetry: QCD Phase Diagram

Abstract

The SU($3$) Polyakov linear-sigma model (PLSM) in mean-field approximation is utilized in analyzing the chiral condensates ${\sigma }_u$, ${\sigma }_d$, ${\sigma }_s$ and the deconfinement order parameters $\varphi$, $\bar{\varphi }$, at finite isospin asymmetry. The bulk thermodynamics including pressure density, interaction measure, susceptibility, and second-order correlations with baryon, strange and electric charge quantum numbers are studied in thermal and dense medium. The PLSM results are confronted to the available lattice QCD calculations. The excellent agreement obtained strengthens the reliability of fixing the PLSM parameters and therefore supports further predictions even beyond the scope of the lattice QCD numerical applicability. From the QCD phase structure at finite isospin chemical potential (${\mu }_I$), a novel expression for the explicit symmetry breaking term $h_3$ is introduced, we find that the pseudo-critical temperatures decrease with the increase in ${\mu }_I$. We conclude that the QCD phase structure in ($T_{\chi }$-${\mu }_I$) plane seems to extend the one in ($T_{\chi }$-${\mu }_B$) plane.

24 pages, 6 figures and 1 table, accepted for publication in IJMPA

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Cited by in corpus (9)

• Meson condensation
• Pion crystals hosting topologically stable baryons
• Chiral magnetic properties of QCD phase-diagram
• Ordinary and exotic mesons in the extended Linear Sigma Model
• Polyakov linear-sigma model in mean-field approximation and optimized perturbation theory
• Bulk viscosity in strong and electroweak matter
• Mass Spectrum of Non-Charmed and Charmed Meson States in Extended Linear-Sigma Model
• Non-extensive Effects on the QCD Equation of State and Fluctuations of Conserved Charges within Polyakov Quark Meson Model
• Derivation of Meson Masses in SU(3) and SU(4) Extended Linear-Sigma Model at Finite Temperature