Kaons and pions in strange quark matter

Abstract

The behavior of kaons and pions in strange quark matter in weak equilibrium, is investigated within the SU(3) Nambu-Jona-Lasinio [NJL] model. This work focuses a region of high densities where the behavior of mesons has not been explored in the framework of this model. It is found that above the density where strange valence quarks appear in the medium, $\rho =3.8{\rho }_0$, a change of behavior of different observables is observed indicating a tendency to the restoration of flavor symmetry. In particular, the splitting between charge multiplets, $K^{+},K^{-};K^0,{\bar{K}}^{0}and{\pi }^{+},{\pi }^{-}$ decrease and the low energy modes with quantum numbers of $K^{-},{\bar{K}}^{0}and{\pi }^{+}$, which are excitations of the Fermi sea, are less relevant than for lower densities.

arXiv comment10 pages, 3 figures included; revised version, some changes in the discussion

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Cited by in corpus (10)

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• Analysis of U${}_A$(1) symmetry-breaking and restoration effects on the scalar-pseudoscalar spectrum
• Pseudoscalars Mesons in Hot, Dense Matter
• Kaon properties in (proto)neutron stars
• Effective restoration of the U_A(1) symmetry with temperature and density
• Phase Diagram, Scalar-Pseudoscalar Meson Behavior and Restoration of Symmetries in (2+1) Polyakov-Nambu-Jona-Lasinio Model
• Anomalous decay of pion and eta at finite density
• Scalar sigma meson at finite temperature in nonlocal quark model
• Anomalous decay of pion and eta at finite temperature
• Effective restoration of chiral and axial symmetries at finite temperature and density