Deconfinement phase transition in hybrid neutron stars from the Brueckner theory with three-body forces and a quark model with chiral mass scaling

Abstract

We study the properties of strange quark matter in equilibrium with normal nuclear matter. Instead of using the conventional bag model in quark sector, we achieve the confinement by a density-dependent quark mass derived from in-medium chiral condensates. In nuclear matter, we adopt the equation of state from the Brueckner-Bethe-Goldstone approach with three-body forces. It is found that the mixed phase can occur, for a reasonable confinement parameter, near the normal nuclear saturation density, and goes over into pure quark matter at about 5 times the saturation. The onset of mixed and quark phases is compatible with the observed class of low-mass neutron stars, but it hinders the occurrence of kaon condensation.

References in corpus (7)

• Chromomagnetic instability in dense quark matter
• Thermodynamics with density and temperature dependent particle masses and properties of bulk strange quark matter and strangelets
• Recent Developments on Kaon Condensation and Its Astrophysical Implications
• Charge, strangeness and radius of strangelets
• Chiral Condensates in Quark and nuclear Matter
• Chiral condensates and size of the sigma term
• A new treatment of the in-medium chiral condensates