Asymptotically conformal CFL quark matter within a nonlocal chiral quark model
arXiv:2409.05859 · doi:10.1103/PhysRevD.111.034004
Abstract
We propose a three-flavor nonlocal NJL model of quark matter with the scalar attractive, vector repulsive and diquark pairing interaction channels. The model is treated within the separable approximation to obtain the EoS of cold quark matter. The analysis of the high density asymptotics of the model allows us to conclude about its qualitative agreement with the perturbative QCD. Particularly, a color superconducting CFL state is found to be the ground one at high densities. The conformal limit of speed of sound and dimensionless interaction measure are also shown to be reached from below and above, respectively. The model is applied to modelling NSs within the scenario of early quark deconfinement triggered by the gravitational instability of the NS matter due to the BEC of a spin-color-flavor singlet three-diquark bound state, the light sexaquark, stable against the weak and strong decays. A conservative estimate of the sexaquark mass based on the most up-to-date results from QCD sum rules and a constituent quark model assumes an early quark deconfinement with the onset mass below . The scenario is shown to be consistent with the present observational constraints on the mass-radius relation and tidal deformability of NSs. Given the fact that the proposed model by construction exhibits an asymptotically conformal behavior, we consider the question about approximately conformal quark matter in NSs. We report a non-perturbative energy density range, which is inaccessible in NSs and where the speed of sound and dimensionless interaction measure of the CFL quark matter simultaneously attain the conformal values.
Accepted for publication in Physical Review D, 16 pages, 4 figures, 2 tables
References in corpus (108)
- A Massive Pulsar in a Compact Relativistic Binary
- GW170817: Measurements of Neutron Star Radii and Equation of State
- 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
- QCD Phenomenology based on a Chiral Effective Lagrangian
- Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
- Color superconductivity in dense quark matter
- NJL-model analysis of dense quark matter
- Instantons in QCD
- QCD at Finite Baryon Density: Nucleon Droplets and Color Superconductivity
- Color-Flavor Locking and Chiral Symmetry Breaking in High Density QCD
- A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
- Dyson-Schwinger Equations and the Application to Hadronic Physics
- The Infrared Behavior of QCD Green's Functions - Confinement, Dynamical Symmetry Breaking, and Hadrons as Relativistic Bound States
- Gravitational-wave constraints on the neutron-star-matter Equation of State
- Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
- Equation of state and neutron star properties constrained by nuclear physics and observation
- From hadrons to quarks in neutron stars: a review
- Hybrid stars that masquerade as neutron stars
- Evidence for quark-matter cores in massive neutron stars
- PSR J0952-0607: The Fastest and Heaviest Known Galactic Neutron Star
- Neutron-star radius constraints from GW170817 and future detections
- Cold Quark Matter
- Superconductivity by long-range color magnetic interaction in high-density quark matter
- Pinch Technique: Theory and Applications
- Coulomb Gauge QCD, Confinement, and the Constituent Representation
- A NICER view of PSR J0030+0451: Implications for the dense matter equation of state
- Superconductivity from perturbative one-gluon exchange in high density quark matter
- Interacting quark matter equation of state for compact stars
- Neutron matter from chiral effective field theory interactions
- Unlocking Color and Flavor in Superconducting Strange Quark Matter
- On the Sound Speed in Neutron Stars
- The phase diagram of three-flavor quark matter under compact star constraints
- Flavour-symmetry breaking of the quark condensate and chiral corrections to the Gell-Mann-Oakes-Renner relation
- NNNLO pressure of cold quark matter: leading logarithm
- Strongly interacting matter exhibits deconfined behavior in massive neutron stars
- Trace anomaly as signature of conformality in neutron stars
- Quark Hadron Continuity in QCD with one Flavor
- Quark deconfinement as supernova explosion engine for massive blue-supergiant stars
- Thermodynamics of the PNJL model
- Dynamics and thermodynamics of a nonlocal Polyakov--Nambu--Jona-Lasinio model with running coupling
- Quark Description of Hadronic Phases
- Quark deconfinement in high-mass neutron stars
- Third family of compact stars within a nonlocal chiral quark model equation of state
- On gap equations and color-flavor locking in cold dense QCD with three massless flavors
- Scaling behavior of quark propagator in full QCD
- Direct extraction of the chiral quark condensate and bounds on the light quark masses
- Evidence for diquarks in lattice QCD
- Meson properties in an extended nonlocal NJL model
- Cooling of Neutron Stars with Color Superconducting Quark Cores
- A first order transition and parity violation in a color superconductor
- Reaching percolation and conformal limits in neutron stars
- Diquark Masses from Lattice QCD
- What is the nature of the HESS J1731-347 compact object?
- Nonperturbative improvement and tree-level correction of the quark propagator
- Thermodynamics of a three-flavor nonlocal Polyakov--Nambu--Jona-Lasinio model
- Quark-hybrid matter in the cores of massive neutron stars
- Quark propagator in the Landau gauge
- Lattice Coulomb Hamiltonian and Static Color-Coulomb Field
- Hybrid stars within a covariant, nonlocal chiral quark model
- Inference of the sound speed and related properties of neutron stars
- Light pseudoscalar mesons in a nonlocal SU(3) chiral quark model
- Electromagnetic Meissner effect in spin-one color superconductors
- Quark-nuclear hybrid equation of state for neutron stars under modern observational constraints
- Quark propagator with two flavors of O(a)-improved Wilson fermions
- Generalized Beth--Uhlenbeck approach to mesons and diquarks in hot, dense quark matter
- Chiral quark models with non-local separable interactions at finite temperature and chemical potential
- Nonlocal Polyakov-Nambu-Jona-Lasinio model and imaginary chemical potential
- What neutron stars tell about the hadron-quark phase transition: a Bayesian study
- Phase diagram of neutral quark matter in nonlocal chiral quark models
- Two-solar-mass hybrid stars: a two model description with the Nambu-Jona-Lasinio quark model
- Characteristics of the chiral phase transition in nonlocal quark models
- Sexaquark dilemma in neutron stars and its solution by quark deconfinement
- Light Quark Masses from Lattice Quark Propagators at Large Momenta
- Propagator Dyson-Schwinger Equations of Coulomb Gauge Yang-Mills Theory Within the First Order Formalism
- Parametrization of a nonlocal, chiral quark model in the instantaneous three-flavor case. Basic formulas and tables
- Diquark correlations in baryons on the lattice with overlap quarks
- Chiral phase transition in a covariant nonlocal NJL model
- Effects of mesonic correlations in the QCD phase transition
- Neutron star cooling constraints for color superconductivity in hybrid stars
- Extensions and further applications of the nonlocal Polyakov--Nambu--Jona-Lasinio model
- Effective repulsion in dense quark matter from non-perturbative gluon exchange
- Sequential deconfinement of quark flavors in neutron stars
- Recovering the conformal limit of color superconducting quark matter within a confining density functional approach
- The Single Flavor Color Superconductivity in a Magnetic Field
- Running mass, effective energy and confinement: the lattice quark propagator in Coulomb gauge
- Color-spin locking in a self-consistent Dyson-Schwinger approach
- Hybrid star models in the light of new multi-messenger data
- Diquark effects in light baryon correlators from lattice QCD
- Phenomenological QCD equations of state for neutron star dynamics: Nuclear-2SC continuity and evolving effective couplings
- Renormalisation of quark propagators from twisted-mass lattice QCD at =2
- A renormalizable extension of the NJL-model
- Thermal evolution of hybrid stars within the framework of a nonlocal Nambu--Jona-Lasinio model
- Nonlocality effects on Color Spin Locking condensates
- Effect of color superconductivity on the mass of hybrid neutron stars in an effective model with pQCD asymptotics
- The Scalar Hexaquark : a Candidate to Dark Matter?
- Two flavor color superconductivity in nonlocal chiral quark models
- Hybrid star phenomenology from the properties of the special point
- Nuclear and nucleon transitions of the H di-baryon
- Color Superconductivity in Schwinger-Dyson Approach -- Strange Quark Mass and Color-Flavor Unlocking Line --
- Thermal twin stars within a hybrid equation of state based on a nonlocal chiral quark model compatible with modern astrophysical observations
- All order resummed leading and next-to-leading soft modes of dense QCD pressure
- Chiral symmetry restoration at finite temperature within the Hamiltonian approach to QCD in Coulomb gauge
- The strange critical endpoint and isentropic trajectories in an Extended PNJL Model with Eight Quark Interactions
- Second look to the Polyakov Loop Nambu-Jona-Lasinio model at finite baryonic density
- Effect of mesonic off-shell correlations in the PNJL equation of state
- On the energy budget of the transition of a neutron star into the third family branch
- Thermodynamics of quark matter with multiquark clusters in an effective Beth-Uhlenbeck type approach
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- Comprehensive Analysis of Constructing Hybrid Stars with an RG-consistent NJL Model
- Bayesian analysis of hybrid neutron star EOS constraints within an instantaneous nonlocal chiral quark matter model
- Quarkyonic picture of isospin QCD
- Properties of the Object HESS J1731-347 as a Twin Compact Star
- Bayesian inference favors quark matter in neutron star interiors