Effective interactions of hyperons and mass-radius relation of neutron stars

Abstract

We examine the role of hyperons in a neutron star based on the relativistic mean field approach. For nuclear matter below 1.5 times the normal nuclear density we constrain the model parameters by using the symmetric nuclear matter properties and theoretical investigations for neutron matter in the literature. We then extend the model to higher densities by including hyperons and isoscalar vector mesons that contain strangeness degree of freedom. We confirm that the $\varphi$ meson induces a $\Lambda$ repulsive force and hardens the equation of state. The hardening arising from the $\varphi$ meson compensates the softening from the existence of hyperons. The flavor SU(3) and spin-flavor SU(6) relations are examined as well. We found that the coupling constants fitted by neutron matter properties could yield high enough maximum mass of a neutron star and the obtained results satisfy both the mass and radius constraints. The onset of the hyperon direct Urca process in neutron stars is also investigated using our parametrization.

arXiv comment15 pages, REVTeX, revised version

References in corpus (52)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• A New Parameterization for the Lagrangian Density of Relativistic Mean Field Theory
• The Physics of Neutron Stars
• Neutron Star Observations: Prognosis for Equation of State Constraints
• Isospin Asymmetry in Nuclei and Neutron Stars
• The Nuclear Equation of State and Neutron Star Masses
• The Equation of State from Observed Masses and Radii of Neutron Stars
• Strange Quark Matter and Compact Stars
• Core-collapse supernova equations of state based on neutron star observations
• Hybrid stars that masquerade as neutron stars
• Soft-core hyperon-nucleon potentials
• Constraining the Symmetry Parameters of the Nuclear Interaction
• The maximum mass and radius of neutron stars and the nuclear symmetry energy
• The Dense Matter Equation of State from Neutron Star Radius and Mass Measurements
• Hyperons and massive neutron stars: vector repulsion and SU(3) symmetry
• Relativistic effective interaction for nuclei, giant resonances, and neutron stars
• Hyperon Puzzle: Hints from Quantum Monte Carlo Calculations
• The Mass and Radius of the Neutron Star in EXO 1745-248
• Hyperons and massive neutron stars: the role of hyperon potentials
• Quark Matter In Massive Compact Stars
• Do hyperons exist in the interior of neutron stars ?
• Composition, Structure and Evolution of Neutron Stars with Kaon Condensates
• Properties of Strange Hadronic Matter in Bulk and in Finite Systems
• Putative Light Scalar Nonet
• Measurement of the Radius of Neutron Stars with High S/N Quiescent Low-mass X-ray Binaries in Globular Clusters
• Neutron star stiff equation of state derived from cooling phases of the X-ray burster 4U 1724-307
• Hyperons in neutron-star cores and two-solar-mass pulsar
• Quark deconfinement and implications for the radius and the limiting mass of compact stars
• An Effective Equation of State for Dense Matter with Strangeness
• Gamma Ray Bursts from delayed collapse of neutron stars to quark matter stars
• Quantum Monte Carlo calculation of the equation of state of neutron matter
• Kaon Condensation and Dynamical Nucleons in Neutron Stars
• Estimation of the effect of hyperonic three-body forces on the maximum mass of neutron stars
• Hyperon mixing and universal many-body repulsion in neutron stars
• Conversion of neutron stars to strange stars as the central engine of gamma-ray bursts
• Microscopic calculations and energy expansions for neutron-rich matter
• Equation of state of nuclear and neutron matter at third-order in perturbation theory from chiral EFT
• Neutron Star Radii, Universal Relations, and the Role of Prior Distributions
• Multi-pomeron repulsion and the Neutron-star mass
• Neutron star crusts from mean field models constrained by chiral effective field theory
• Measuring Neutron Star Radii via Pulse Profile Modeling with NICER
• Physics input for modelling superfluid neutron stars with hyperon cores
• Neutron stars in a Skyrme model with hyperons
• A study of Lambda hypernuclei within the Skyrme-Hartree-Fock Model
• Implications of Hyperon Pairing for Cooling of Neutron Stars
• Kaon Condensation in Neutron Stars with Skyrme-Hartree-Fock Models
• Hyperon Puzzle of Neutron Stars with Skyrme Force Models
• Hyperons in a relativistic mean-field approach to asymmetric nuclear matter
• Microscopically constrained mean field models from chiral nuclear thermodynamics
• Pentaquark baryons in SU(3) quark model
• Role of nonlinear vector meson interactions in hyperon stars

Cited by in corpus (10)

• Bayesian modeling of the nuclear equation of state for neutron star tidal deformabilities and GW170817
• Predicting the moment of inertia of pulsar J0737-3039A from Bayesian modeling of the nuclear equation of state
• New effective interactions for hypernuclei in density dependent relativistic mean field model
• The Role of Baryon Structure in Neutron Stars
• Higher mass limits of neutron stars from the equation of states in curved spacetime
• In medium properties of $K^0$ and $\varphi$ mesons under an external magnetic field
• Impact of medium modification of the nucleon weak and electromagnetic form factors on the neutrino mean free path in dense matter
• Effect of Dark matter and $\sigma$-cut potential on radial and non-radial oscillation modes in neutron stars
• Influence of hyperon-hyperon interaction on the properties of neutron stars
• Effects of Strong Magnetic Fields on the Hadron-Quark Deconfinement Transition