| We study the equation of state of the condense matter and calculate the mass-radius relation of hybrid stars with a mixed phase composed of the hadronic matter and strange quark matter are studied. Due to the new freedom of strange flavor, strange quark matter might be more stable than nuclear matters and other two-flavor quark matter, and therefore could be the true ground state of the hadron matter. We use the relativistic mean-field theory to study the equation of state of nuclear matter. The quark phase is investigated by the quark quasiparticle model with a self-consistent thermodynamic and statistical. We present the stability window of the strange quark matter with respect to the interaction coupling constant versus the bag constant. By comparing with the classical of nuclear physics, we can determine the stability area of quark matters. At the high density, the hadron matter will be converted into the strange quark matter through a deconfined phase transition. We find that the appearance of the quark-hadron mixed phases is associated with the meta-stable or unstable regions of the pure quark matter parameters. The mass-radius relation of the hybrid star is dominated by the equation of state of quark matter rather than nuclear matter. Due to the existence of the mixed phase, the maximum mass of hybrid star is 1.64 M(?) with radius about 10.6km. |
PDF Full Text Request