Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-01-13
Phys.Rev.C81:055803,2010
Physics
Nuclear Physics
Nuclear Theory
13 pages, 12 figures, version to appear in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.81.055803
The isospin- and momentum-dependent MDI interaction, which has been extensively used in intermediate-energy heavy-ion reactions to study the properties of asymmetric nuclear matter, is extended to include the nucleon-hyperon and hyperon-hyperon interactions by assuming same density, momentum and isospin dependence as for the nucleon-nucleon interaction. The parameters in these interactions are determined from the empirical hyperon single-particle potentials in symmetric nuclear matter at saturation density. The extended MDI interaction is then used to study in the mean-field approximation the equation of state of hypernuclear matter and also the properties of hybrid stars by including the phase transition from the hypernuclear matter to the quark matter at high densities. In particular, the effects of attractive and repulsive $\Sigma$N interactions and different values of symmetry energies on the hybrid star properties are investigated.
Chen Lie-Wen
Ko Che Ming
Li Bao-An
Xu Jun
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