Effects of entanglement and instanton suppression at finite temperature in a SU(2) EPNJL model with anomaly

Abstract

We investigate the phase transitions characterized by deconfinement and restoration of chiral and axial symmetries,at finite temperature, in the framework of QCD inspired models. We compare the results obtained in the SU(2) Polyakov-Nambu-Jona-Lasinio model with anomaly and in its extended version, the Entangled Polyakov-Nambu-Jona-Lasinio model. In the last version, four-quark vertices with entanglement between the chiral condensate and the Polyakov loop are considered. The thermodynamics of the phase transitions, the meson spectrum, and in particular the convergence of axial and chiral partners, will be analyzed, as well as the topological susceptibility. We find that an explicit temperature dependence of the coupling vertices is necessary in both models in order to have effective restoration of the U${}_A$(1) symmetry.

19 pages, 4 figures; PRD version

References in corpus (17)

• The chiral and deconfinement aspects of the QCD transition
• The Phase Structure of the Polyakov--Quark-Meson Model
• Mesonic correlation functions at finite temperature and density in the Nambu-Jona-Lasinio model with a Polyakov loop
• Thermodynamics of the PNJL model
• The chiral transition and U(1)_A symmetry restoration from lattice QCD using Domain Wall Fermions
• Hot Quark Matter with an Axial Chemical Potential
• Scalar-pseudoscalar meson behavior and restoration of symmetries in SU(3) PNJL model
• Pseudoscalar neutral mesons in hot and dense matter
• Analysis of U${}_A$(1) symmetry-breaking and restoration effects on the scalar-pseudoscalar spectrum
• Chiral Lagrangian at finite temperature from the Polyakov-Chiral Quark Model
• The QCD critical end point in the PNJL model
• Pseudoscalars Mesons in Hot, Dense Matter
• Equation of state in the PNJL model with the entanglement interaction
• Theta vacuum effects on QCD phase diagram
• Violations of parity and charge conjugation in the theta vacuum with imaginary chemical potential
• Effects of the Regularization on the Restoration of Chiral and Axial Symmetries
• Interplay between chiral and axial symmetries in a SU(2) Nambu--Jona-Lasinio Model with the Polyakov loop

Cited by in corpus (9)

• Existence of the critical endpoint in the vector meson extended linear sigma model
• Model prediction for temperature dependence of meson pole masses from lattice QCD results on meson screening masses
• Impact of the vector interaction on the phase structure of QCD matter
• Exploring axial $U(1)$ restoration in a modified 2+1 flavor Polyakov quark meson model
• Determination of $U(1{)}_{\mathrm{A}}$ restoration from pion and $a_0$-meson screening masses: Toward the chiral regime
• Chiral phase transition and kaon-to-pion ratios in the entanglement SU(3) PNJL model
• $U_A(1)$ symmetry restoration at high baryon density
• Backreaction of mesonic fluctuations on the axial anomaly at finite temperature
• Mott dissociation and kaon to pion ratio in the EPNJL model