Isospin- and momentum-dependent effective interactions for the baryon octet and the properties of hybrid stars
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Date
2010
Authors
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Journal ISSN
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Publisher
American Physical Society
Abstract
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 the 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 hypernuclear matter to 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.
Description
Journals published by the American Physical Society can be found at http://publish.aps.org/
Keywords
HYPERON-NUCLEON-INTERACTIONS, NEUTRON-STARS, DIRAC PHENOMENOLOGY, PHASE-TRANSITIONS, BRUECKNER THEORY, SIGMA(-) ATOMS, QUARK MATTER, DENSE, MATTER, HYPERNUCLEI, EQUATION, Physics
Citation
Jun Xu, Lie-Wen Chen, Che Ming Ko and Bao-An Li. Phys.Rev.C 81 055803 2010. "Copyright (2010) by the American Physical Society."