Isovector properties of quark matter and quark stars in an isospin-dependent confining model
arXiv:1708.09599 · doi:10.1103/PhysRevD.96.083019
Abstract
The confining quark matter (CQM) model, in which the confinement and asymptotic freedom are modeled via the Richardson potential for quark-quark vector interaction and the chiral symmetry restoration at high density is described by the density dependent quark mass, is extended to include isospin dependence of the quark mass. Within this extended isospin-dependent confining quark matter (ICQM) model, we study the properties of strange quark matter and quark stars. We find that including isospin dependence of the quark mass can significantly influence the quark matter symmetry energy, the stability of strange quark matter and the mass-radius relation of quark stars. In particular, we demonstrate although the recently discovered large mass pulsars PSR J1614.2230 and PSR J0348+0432 with masses around two times solar mass () cannot be quark stars within the original CQM model, they can be well described by quark stars in the ICQM model if the isospin dependence of quark mass is strong enough so that the quark matter symmetry energy is about four times that of a free quark gas. We also discuss the effects of the density dependence of quark mass on the properties of quark stars. Our results indicate that the heavy quark stars with mass around (if exist) can put strong constraints on isospin and density dependence of the quark mass as well as the quark matter symmetry energy.
arXiv comment10 pages, 6 figures, 2 tables. Presentation improved, 2 tables and discussions added. Accepted version to appear in PRD
References in corpus (70)
- Shapiro delay measurement of a two solar mass neutron star
- A Massive Pulsar in a Compact Relativistic Binary
- QCD Phenomenology based on a Chiral Effective Lagrangian
- NJL-model analysis of dense quark matter
- The Physics of Neutron Stars
- Recent Progress and New Challenges in Isospin Physics with Heavy-Ion Reactions
- Dyson-Schwinger Equations and the Application to Hadronic Physics
- The phase diagram of dense QCD
- Isospin Asymmetry in Nuclei and Neutron Stars
- Strange Quark Matter and Compact Stars
- Hybrid stars that masquerade as neutron stars
- QCD at finite isospin density
- Cold Quark Matter
- Constraining the Symmetry Parameters of the Nuclear Interaction
- Constraints on neutron star radii based on chiral effective field theory interactions
- Hadronization in the SU(3) Nambu-Jona-Lasinio Model
- Enforced Electrical Neutrality of the Color-Flavor Locked Phase
- Strange Stars with Realistic Quark Vector Interaction and Phenomenological Density-dependent Scalar Potential
- Small, Dense Quark Stars from Perturbative QCD
- Asymmetric nuclear matter:the role of the isovector scalar channel
- Composition and stability of hybrid stars with hyperons and quark color-superconductivity
- Quark matter in compact stars?
- Neutron Star Masses and Radii from Quiescent Low-Mass X-ray Binaries
- Measurement of the Radius of Neutron Stars with High S/N Quiescent Low-mass X-ray Binaries in Globular Clusters
- The Equation of State of Deconfined Matter at Finite Chemical Potential in a Quasiparticle Description
- Pion Superfluidity and Meson Properties at Finite Isospin Density
- Compact stars with color superconducting quark matter
- Quark deconfinement and implications for the radius and the limiting mass of compact stars
- Phase diagram and critical endpoint for strongly-interacting quarks
- Quark Matter in Strong Magnetic Field
- Neutron stars and the transition to color-superconducting quark matter
- Three-dimensional hydrodynamic simulations of the combustion of a neutron star into a quark star
- The finite temperature transition for 2-flavour lattice QCD at finite isospin density
- Flavor-Mixing Effects on the QCD Phase Diagram at non-vanishing Isospin Chemical Potential: One or Two Phase Transitions?
- Isospin Chemical Potential and the QCD Phase Diagram at Nonzero Temperature and Baryon Chemical Potential
- Isospin-dependent properties of asymmetric nuclear matter in relativistic mean-field models
- Thermodynamics, strange quark matter, and strange stars
- The role of quark mass in cold and dense perturbative QCD
- Medium effects in strange quark matter and strange stars
- Mass formulas and thermodynamic treatment in the mass-density-dependent model of strange quark matter
- Deconfinement phase transition in hybrid neutron stars from the Brueckner theory with three-body forces and a quark model with chiral mass scaling
- Thermodynamics with density and temperature dependent particle masses and properties of bulk strange quark matter and strangelets
- Rejecting proposed dense-matter equations of state with quiescent low-mass X-ray binaries
- Strange quark stars within the Nambu-Jona-Lasinio model
- Testing Deconfinement at High Isospin Density
- Probing the Nuclear Symmetry Energy with Heavy Ion Collisions
- The mass and the radius of the neutron star in the transient low mass X-ray binary SAX J1748.9-2021
- Effect of color superconductivity on the mass and radius of a quark star
- Quark matter symmetry energy and quark stars
- Quark stars within relativistic models
- Equilibrium sequences of non rotating and rapidly rotating crystalline color superconducting hybrid stars
- Nuclear matter symmetry energy and the symmetry energy coefficient in the mass formula
- The influence of medium effects on the gross structure of hybrid stars
- Coupling of pion condensate, chiral condensate and Polyakov loop in an extended NJL model
- A three stage model for the inner engine of Gamma Ray Burst: Prompt emission and early afterglow
- Self-bound CFL stars in binary systems : are they "hidden" among the black hole candidates?
- Stability of strangelet at finite temperature
- Quark mass density- and temperature- dependent model for bulk strange quark matter
- Phase transition from nuclear matter to color superconducting quark matter: the effect of the isospin
- Strange quark matter in strong magnetic fields within a confining model
- Influence of vector interactions on the hadron-quark/gluon phase transition
- A note on the discovery of a 2M_\odot pulsar
- A consistent thermodynamic treatment for quark mass density-dependent model
- An Ultra Low Mass and Small Radius Compact Object in 4U 1746-37?
- Isospin properties of quark matter from a 3-flavor NJL model
- Constraints on the mass and radius of the accreting neutron star in the Rapid Burster
- Self-bound models of compact stars and recent mass-radius measurements
- Soliton solutions of the improved quark mass density-dependent model at finite temperature
- Improved quark mass density- dependent model with quark-sigma meson and quark-omega meson couplings
- Are Radio Pulsars Strange Stars ?
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- Bayesian inference of strange star equation of state using the GW170817 and GW190425 data
- Interacting and quark matter at finite densities and quark stars
- GW190814: Circumstantial Evidence for Up-Down Quark Star
- Interface effects of strange quark matter with density dependent quark masses
- Interface effects of quark matter: Light-quark nuggets and compact stars
- Properties of quark-matter cores in massive hybrid stars
- Compact stars in quantum spacetime
- Quark matter symmetry energy effect on equation of state for neutron stars
- Interface effects of strange quark matter