Pseudoscalars Mesons in Hot, Dense Matter

Abstract

Phase transitions in hot and dense matter and the in--medium behavior of pseudoscalar mesons (${\pi }^{\pm },{\pi }^0,K^{\pm },K^0,{\bar{K}}^0,\eta and{\eta }^{\prime }$) are investigated, in the framework of the three flavor Nambu--Jona-Lasinio model, including the 't Hooft interaction, which breaks the $U_A(1)$ symmetry. Three different scenarios are considered: zero density and finite temperature, zero temperature and finite density in quark matter with different degrees of strangeness, and finite temperature and density. At T=0, the role of strange valence quarks in the medium is discussed, in connection with the phase transition and the mesonic behavior. It is found that the appearance of strange quarks, above certain densities, leads to meaningful changes in different observables, especially in matter with β$--equilibrium.Thebehaviorofmesonsinthe$T-ρ$ plane is analyzed in connection with possible signatures of restoration of symmetries.

33 pages, 12 figures, PRC version

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• How parameters and regularization affect the PNJL model phase diagram and thermodynamic quantities
• Pion and kaon condensation in a 3-flavor NJL model
• Nonextensive effects in the Nambu--Jona-Lasinio model of QCD
• The QCD critical end point in the SU(3) Nambu--Jona-Lasinio model
• D mesons at finite temperature and density in the PNJL model
• Kaon properties in (proto)neutron stars
• Pion, sigma-meson and diquarks in the 2SC phase of dense cold quark matter
• Effective restoration of the U_A(1) symmetry with temperature and density
• U_A(1) Anomaly in Hot and Dense QCD and the Critical Surface
• Mesons and diquarks in the color neutral 2SC phase of dense cold quark matter
• Nonextensive Nambu Jona-Lasinio model of QCD matter revisited
• Mott dissociation of pions and kaons in hot, dense quark matter
• Medium modification of hadron masses and the thermodynamics of hadron resonance gas model
• Compact stars with a quark core within NJL model
• Study of Beta Equilibrated 2+1 Flavor Quark Matter in PNJL Model
• Mass spectrum of diquarks and mesons in the color--flavor locked phase of dense quark matter
• What Does Low Energy Physics Tell Us About The Zero Momentum Gluon Propagator
• Effects of Model Parameters in Thermodynamics of the PNJL Model
• Mesons and diquarks in neutral color superconducting quark matter with $\beta$-equilibrium
• Effects of entanglement and instanton suppression at finite temperature in a SU(2) EPNJL model with anomaly
• Decay of a scalar $\sigma$-meson near the critical end-point in the PNJL model
• Strange matter and kaon to pion ratio in SU(3) PNJL model
• Effects of the Regularization on the Restoration of Chiral and Axial Symmetries
• Effects of the anomalous magnetic moments of the quarks on the neutral pion properties within a SU(2) Nambu-Jona Lasinio model
• Interplay between chiral and axial symmetries in a SU(2) Nambu--Jona-Lasinio Model with the Polyakov loop
• Chiral phase transition and kaon-to-pion ratios in the entanglement SU(3) PNJL model
• Anomalous decay of pion and eta at finite temperature
• In-medium effect on the thermodynamics and transport coefficients in van der Waals hadron resonance gas
• Effects of Dirac sea on pion propagation in asymmetric nuclear matter
• Using the Beth-Uhlenbeck approach to describe the kaon to pion ratio in a 2+1 flavor PNJL model
• Momentum transport of chiral modes in a thermal QCD medium
• $U_A(1)$ symmetry restoration at high baryon density
• Effective restoration of chiral and axial symmetries at finite temperature and density
• Behavior of the topological susceptibility at finite T and $\mu$ and signs of restoration of chiral symmetries
• The role of the chiral phase transition in modelling the kaon to pion ratio
• Two photon decay of ${\pi }^0$ and $\eta$ at finite temperature and density
• Phase transitions in quark matter and behaviour of physical observables in the vicinity of the critical end point
• A study of meson condensation and of the QCD critical line
• Mott dissociation and kaon to pion ratio in the EPNJL model
• Pseudoscalar mesons from a PNJL model at zero temperature