Interacting $ud$ and $uds$ quark matter at finite densities and quark stars

Abstract

The stability and equation of state of quark matter are studied within both two-flavor and (2+1)-flavor Nambu-Jona-Lasinio (NJL) models including the vector interactions. With a free parameter $\alpha$, the Lagrangian is constructed by two parts, the original NJL Lagrangian and the Fierz transformation of it, as $L=(1-\alpha )L_{\mathrm{NJL}}+\alpha L_{\mathrm{Fierz}}$. We find that there is a possibility for both $ud$ nonstrange and $uds$ strange matter being absolute stable, depending on the interplay of the confinement with quark vector interaction and the exchange interaction channels. The calculated quark star properties can reconcile with the recently measured masses and radii of PSR J0030+0451 and PSR J0740+6620, as well as the tidal deformability of GW170817. Furthermore, the more strongly-interacting quark matter in the nonstrange stars allows a stiffer equation of state and consequently a higher maximum mass ($\sim 2.7M_{\odot }$) than the strange ones ($\sim 2.1M_{\odot }$). The sound velocities in strange and nonstrange quark star matter are briefly discussed compared to those of neutron star matter.

13 pages, 9 figures, 2 tables, Phys. Rev. D (2022) accepted

References in corpus (36)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
• A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
• Sound velocity bound and neutron stars
• Was GW190814 a black hole -- strange quark star system?
• Stability of CFL cores in Hybrid Stars
• Unified Interacting Quark Matter and its Astrophysical Implications
• Extreme Matter meets Extreme Gravity: Ultra-heavy neutron stars with crossovers and first-order phase transitions
• Neutron star equation of state: QMF modeling and applications
• Constraints on the maximum mass of neutron stars with a quark core from GW170817 and NICER PSR J0030+0451 data
• The calculation of the equation of state of QCD at finite chemical potential and zero temperature
• Bayesian inference of strange star equation of state using the GW170817 and GW190425 data
• Quarkyonic stars with isospin-flavor asymmetry
• Peaks of sound velocity in two color dense QCD: quark saturation effects and semishort range correlations
• Large and massive neutron stars: Implications for the sound speed in dense QCD
• Remarks on nuclear matter: how an ${\omega }_0$ condensate can spike the speed of sound, and a model of $Z(3)$ baryons
• Vector interaction, charge neutrality and multiple chiral critical point structures
• The Radius of PSR J0740+6620 from NICER and XMM-Newton Data
• Bayesian inference of quark star equation of state using the NICER PSR J0030+0451 data
• Insights on the peak in the speed of sound of ultradense matter
• Isovector properties of quark matter and quark stars in an isospin-dependent confining model
• Cusp in the Symmetry Energy, Speed of Sound in Neutron Stars and Emergent Pseudo-Conformal Symmetry
• QCD phase diagram in chiral imbalance with self-consistent mean field approximation
• A Bayesian analysis of the properties of hybrid stars with the NJL model
• Hadron-quark phase transition in the SU(3) local Nambu-Jona-Lasinio (NJL) model with vector interaction
• Pulsar glitches in a strangeon star model. II. The activity
• Speed of sound in dense matter and two families of compact stars
• Color superconductivity with self-consistent NJL-type model
• QCD equation of state and the structure of neutron stars in NJL model
• QCD phase transition and equation of state of stellar strong interaction matter via Dyson-Schwinger equation approach
• QCD phase diagram at finite isospin and baryon chemical potentials with the self-consistent mean field approximation
• The sound speed and core of massive compact stars: A manifestation of hadron-quark duality

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• Interface effects of quark matter: Light-quark nuggets and compact stars
• Radial and Non-Radial Oscillations of Inverted Hybrid Stars
• Rescaling strange-cluster stars and its implications on gravitational-wave echoes
• Two-flavor color superconducting quark stars may not exist
• Hybrid stars with large quark cores within the parity doublet model and modified NJL model
• Universal relations for anisotropic interacting quark stars
• Bayesian inference of strangeon matter using the measurements of PSR J0437-4715 and GW190814
• Cold quark matter in a quasiparticle model: thermodynamic consistency and stellar properties
• The study of nonstrange quark stars within a modified NJL model
• Hybrid stars may have an inverted structure
• Diquark and chiral condensate in a self-consistent NJL-type model
• Comparing strange and non-strange quark stars within resummed QCD at NLO
• Strangelets at finite temperature: nucleon emission rates, interface and shell effects
• Rotational Properties of Inverted Hybrid Stars
• A holographic study on QCD phase transition and neutron star properties
• Equation of State of Decompressed Quark Matter, and Observational Signatures of Quark-Star Mergers
• Constraining the competition between the deconfinement and chiral phase transitions in light of the multimessenger era
• Compact dwarfs made of light-quark nuggets