Isospin- and momentum-dependent effective interactions for the baryon octet and the properties of hybrid stars

Journal Article · Sat May 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.055803· OSTI ID:21389073

Jun, Xu ^[1]; Liewen, Chen ^[2]; Ko, Che Ming ^[3]; Baoan, Li ^[4]

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1. Cyclotron Institute, Texas A and M University, College Station, Texas 77843-3366 (United States)
2. Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China)
3. Cyclotron Institute and Department of Physics and Astronomy, Texas A and M University, College Station, Texas 77843-3366 (United States)
4. Department of Physics and Astronomy, Texas A and M University-Commerce, Commerce, Texas 75429-3011 (United States)

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 SIGMAN interactions and different values of symmetry energies on the hybrid star properties are investigated.

• OSTI ID: 21389073
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevC.81.055803; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
ASYMMETRY
BARYON OCTETS
DENSITY
EQUATIONS OF STATE
HEAVY ION REACTIONS
HYPERON-HYPERON INTERACTIONS
HYPERONS
ISOSPIN
MEAN-FIELD THEORY
NUCLEAR MATTER
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PHASE TRANSFORMATIONS
QUARK MATTER
SATURATION
STARS
SYMMETRY
BARYON-BARYON INTERACTIONS
BARYONS
CALCULATION METHODS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MATTER
MULTIPLETS
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
PARTICLE MULTIPLETS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
STRANGE PARTICLES