Hyperon star in a modified quark meson coupling model

Abstract

We determine the equation of state (EOS) of nuclear matter with the inclusion of hyperons in a self-consistent manner by using a Modified Quark Meson Coupling Model (MQMC) where the confining interaction for quarks inside a baryon is represented by a phenomenological average potential in an equally mixed scalar-vector harmonic form. The hadron-hadron interaction in nuclear matter is then realized by introducing additional quark couplings to $\sigma$, $\omega$, and $\rho$ mesons through mean-field approximations. The effect of a nonlinear $\omega$-$\rho$ term on the equation of state is studied. The hyperon couplings are fixed from the optical potential values and the mass-radius curve is determined satisfying the maximum mass constraint of $2$~M${}_{\odot }$ for neutron stars, as determined in recent measurements of the pulsar PSR J0348+0432. We also observe that there is no significant advantage of introducing the nonlinear $\omega$-$\rho$ term in the context of obtaining the star mass constraint in the present set of parametrizations.

10 pages, Accepted in Phys. Rev. C

References in corpus (45)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• The equation of state for nucleon matter and neutron star structure
• Neutron Star Structure and the Equation of State
• The Equation of State from Observed Masses and Radii of Neutron Stars
• Neutron Star Structure and the Neutron Radius of 208Pb
• Strange Quark Matter and Compact Stars
• Constraints on a phenomenologically parameterized neutron-star equation of state
• Composition and Structure of Protoneutron Stars
• Constraints on the symmetry energy and neutron skins from experiments and theory
• Constraining the Symmetry Parameters of the Nuclear Interaction
• The Skyrme Interaction in finite nuclei and nuclear matter
• The Neutron Star Mass-Radius Relation and the Equation of State of Dense Matter
• Astrophysical Measurement of the Equation of State of Neutron Star Matter
• The Dense Matter Equation of State from Neutron Star Radius and Mass Measurements
• Hyperons and massive neutron stars: vector repulsion and SU(3) symmetry
• On the nature and evolution of the unique binary pulsar J1903+0327
• The role of nucleon structure in finite nuclei
• Do hyperons exist in the interior of neutron stars ?
• Evidence of Xi hypernuclear production in the ^{12}C(K^-,K^+)^{12}_{Xi}Be reaction
• Proto-Neutron and Neutron Stars in a Chiral SU(3) Model
• Hyperons in neutron-star cores and two-solar-mass pulsar
• Observational constraints on hyperons in neutron stars
• Incompressibility in finite nuclei and nuclear matter
• An Effective Equation of State for Dense Matter with Strangeness
• An Eccentric Binary Millisecond Pulsar in the Galactic Plane
• Strangeness in Hadronic Stellar Matter
• The Thermal X-ray Spectra of Cen X-4, Aql X-1, and 4U 1608-522 in Quiescence
• Cold uniform matter and neutron stars in the quark-mesons-coupling model
• Constraints on $\Sigma$ Nucleus Dynamics from Dirac Phenomenology of ${\Sigma }^{-}$ Atoms
• Non-rotating and rotating neutron stars in the extended field theoretical model
• Equation of state for neutron stars in SU(3) flavor symmetry
• A new equation of state for neutron star matter with nuclei in the crust and hyperons in the core
• Neutron stars with hyperon cores: stellar radii and EOS near nuclear density
• Interplay between the symmetry energy and the strangeness content of neutron stars
• Hyperon effects in covariant density functional theory with recent astrophysical observations
• Effects of Fock term, tensor coupling and baryon structure variation on a neutron star
• Large-mass neutron stars with hyperonization
• Hot Nuclear Matter in the Quark Meson Coupling Model
• Neutron star properties in a chiral SU(3) model
• Effects of isospin and momentum dependent interactions on thermal properties of asymmetric nuclear matter
• Compact stars within an asy-soft quark-meson-coupling model
• Nuclear chiral dynamics and phases of QCD
• Nuclear symmetry energy in a modified quark meson coupling model
• Rotating Neutron Stars in a Chiral SU(3) Model

Cited by in corpus (15)

• Neutron star equation of state from the quark level in the light of GW170817
• Constraining strangeness in dense matter with GW170817
• Neutron star matter with strange interactions in a relativistic quark model
• Many-body forces in magnetic neutron stars
• The Role of Baryon Structure in Neutron Stars
• Quark mean-field model for nuclear matter with or without bag
• Nucleon radius effects on neutron stars in quark mean field model
• Quark mean field model with pion and gluon corrections for $\Lambda ,{\Xi }^0$ hypernuclei and neutron stars
• Equation of state of nuclear matter and neutron stars: Quark mean-field model versus relativistic mean-field model
• Effects of hadron-quark phase transition on properties of Neutron Stars
• Properties of Neutron Stars with hyperon cores in parameterized hydrostatic conditions
• Single ${\Lambda }_c^{+}$ hypernuclei within quark mean-field model
• Density-dependent quark mean-field model for nuclear matter and neutron stars
• Role of $\Delta$s in determining the properties of Neutron Stars in parameterized hydrostatic equilibrium
• Neutron stars with Bogoliubov quark-meson coupling model