TITLE:
Hardon-Quark Hybrid Stars Constructed by the Nonlinear σ-ω-ρ Mean-Field Model and MIT-Bag Model
AUTHORS:
Schun T. Uechi, Hiroshi Uechi
KEYWORDS:
Nonlinear σ-ω-ρ Mean-Field, Hyperon Onset Densities, Hyperon Coupling Ratios, Hadron-Quark Hybrid Stars
JOURNAL NAME:
Open Access Library Journal,
Vol.2 No.11,
November
18,
2015
ABSTRACT: Density-dependent relations among saturation properties of symmetric
nuclear matter and hyperonic matter, properties of hadron-(strange) quark
hybrid stars are discussed by applying the conserving nonlinear s-w-r hadronic
mean-field theory. Nonlinear interactions that will be renormalized as
effective coupling constants, effective masses and sources of meson equations
of motion are constructed self-consistently by maintaining thermodynamic
consistency to the mean-field
approximation. The coupling constants expected from the hadronic mean-field
model and SU (6) quark model for the vector coupling constants are compared;
the coupling constants exhibit different density-dependent results for effective
masses and binding energies of hyperons, properties of hadron and hadron-quark
stars. The nonlinear s-w-r hadronic
mean-field approximation with or without vacuum fluctuation corrections and
strange quark matter defined by MIT-bag model are employed to examine
properties of hadron-(strange) quark hybrid stars. The hadron-(strange) quark hybrid
stars become more stable at high densities compared to pure hadronic and pure
strange quark stars.