Density functional approach to quark matter with confinement and color superconductivity
arXiv:2204.03611 · doi:10.1103/PhysRevD.105.114042
Abstract
We present a novel relativistic density-functional approach to modeling quark matter with a mechanism to mimic confinement. The quasiparticle treatment of quarks provides their suppression due to a large quark selfenergy already at the mean-field level. We demonstrate that our approach is equivalent to a chiral quark model with medium-dependent couplings. The dynamical restoration of the chiral symmetry is ensured by construction of the density functional. Supplemented with the vector repulsion and diquark pairing the model is applied to construct a hybrid quark-hadron EoS of cold compact-star matter. We study the connection of such a hybrid EoS with the stellar mass-radius relation and tidal deformability. The model results are compared to various observational constraints including the NICER radius measurement of PSR J0740+6620 and the tidal deformability constraint from GW170817. The model is shown to be consistent with the constraints, still allowing for further improvement by adjusting the vector repulsion and diquark pairing couplings.
arXiv commentVersion accepted for publication in Physical Review D, 16 pages, 16 figures
References in corpus (57)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- A Massive Pulsar in a Compact Relativistic Binary
- GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs
- GW170817: Measurements of Neutron Star Radii and Equation of State
- GW190814: Gravitational Waves from the Coalescence of a 23 M Black Hole with a 2.6 M Compact Object
- PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
- NJL-model analysis of dense quark matter
- A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
- Gravitational-wave constraints on the neutron-star-matter Equation of State
- Composition and thermodynamics of nuclear matter with light clusters
- Phases of QCD: lattice thermodynamics and a field theoretical model
- Equation of state and neutron star properties constrained by nuclear physics and observation
- From hadrons to quarks in neutron stars: a review
- Chiral crossover in QCD at zero and non-zero chemical potentials
- Neutron-star radius constraints from GW170817 and future detections
- I-Love-Q Relations in Neutron Stars and their Applications to Astrophysics, Gravitational Waves and Fundamental Physics
- Generic conditions for stable hybrid stars
- Stringent constraints on neutron-star radii from multimessenger observations and nuclear theory
- The QCD Running Coupling
- A NICER view of PSR J0030+0451: Implications for the dense matter equation of state
- Do hyperons exist in the interior of neutron stars ?
- Implications from GW170817 and I-Love-Q relations for relativistic hybrid stars
- Neutron matter from chiral effective field theory interactions
- Maximum mass of neutron stars and strange neutron-star cores
- Compact stars with sequential QCD phase transitions
- Flavour-symmetry breaking of the quark condensate and chiral corrections to the Gell-Mann-Oakes-Renner relation
- Constraining twin stars with GW170817
- Modern compact star observations and the quark matter equation of state
- Recent thermodynamic results from lattice QCD analyzed within a quasi-particle model
- Implications of the measurement of pulsars with two solar masses for quark matter in compact stars and HIC. A NJL model case study
- Hadron-Quark Crossover and Massive Hybrid Stars
- Third family of compact stars within a nonlocal chiral quark model equation of state
- Finite-size effects at the hadron-quark transition and heavy hybrid stars
- Quark-Nuclear Hybrid EoS with Excluded Volume Effects
- High-mass twin stars with a multi-polytrope EoS
- Was GW170817 a canonical neutron star merger? Bayesian analysis with a third family of compact stars
- Hybrid equation of state with pasta phases and third family of compact stars
- Relativistic hybrid stars with sequential first-order phase transitions and heavy-baryon envelopes
- Quark-nuclear hybrid equation of state for neutron stars under modern observational constraints
- Generalized Beth--Uhlenbeck approach to mesons and diquarks in hot, dense quark matter
- Constraining hadron-quark phase transition parameters within the quark-mean-field model using multimessenger observations of neutron stars
- Mixed phase effects on high-mass twin stars
- First-order phase transition from hypernuclear matter to deconfined quark matter obeying new constraints from compact star observations
- Sexaquark dilemma in neutron stars and its solution by quark deconfinement
- Parametrization of a nonlocal, chiral quark model in the instantaneous three-flavor case. Basic formulas and tables
- Twin Stars within the SU(3) Chiral Quark-Meson Model
- Studying the onset of deconfinement with multi-messenger astronomy of neutron stars
- Two novel approaches to the hadron-quark mixed phase in compact stars
- The Radius of PSR J0740+6620 from NICER and XMM-Newton Data
- The special point on the hybrid star mass--radius diagram and its multi--messenger implications
- Medium induced Lorentz symmetry breaking effects in nonlocal PNJL models
- Hybrid neutron stars in the mass-radius diagram
- Special point on the mass radius diagram of hybrid stars
- Crossover transition to quark matter in heavy hybrid stars
- A mixing interpolation method to mimic pasta phases in compact star matter
- Locating the special point of hybrid neutron stars
- Transport theory with self-consistent confinement related to the lattice data