Recovering the conformal limit of color superconducting quark matter within a confining density functional approach
arXiv:2209.02050 · doi:10.3390/particles5040038
Abstract
We generalize a recently proposed confining relativistic density-functional approach to the case of density dependent vector and diquark couplings. The particular behavior of these couplings is motivated by the non-perturbative gluon exchange in dense quark matter and provides the conformal limit at asymptotically high densities. We demonstrate that this feature of the quark matter EoS is consistent with a significant stiffness in the density range typical for the interiors of neutron stars. In order to model these astrophysical objects we construct a family of hybrid quark-hadron EoSs of cold stellar matter. We also confront our approach with the observational constraints on the mass-radius relation of neutron stars and their tidal deformabilities and argue in favor of a quark matter onset at masses below
17 pages, 7 figures
References in corpus (23)
- A Massive Pulsar in a Compact Relativistic Binary
- 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
- The equation of state in (2+1)-flavor QCD
- Neutron-star radius constraints from GW170817 and future detections
- A NICER view of PSR J0030+0451: Implications for the dense matter equation of state
- On the Sound Speed in Neutron Stars
- How perturbative QCD constrains the Equation of State at Neutron-Star densities
- BEC-BCS Crossover in the Nambu--Jona-Lasinio Model of QCD
- Reaching percolation and conformal limits in neutron stars
- A general, scale-independent description of the sound speed in neutron stars
- Quark-nuclear hybrid equation of state for neutron stars under modern observational constraints
- 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
- Studying the onset of deconfinement with multi-messenger astronomy of neutron stars
- Neutron-star radii based on realistic nuclear interactions
- The special point on the hybrid star mass--radius diagram and its multi--messenger implications
- Parametrisations of relativistic energy density functionals with tensor couplings
- Hybrid neutron stars in the mass-radius diagram
- Special point on the mass radius diagram of hybrid stars
- Neutron stars with crossover to color superconducting quark matter
- Confining density functional approach for color superconducting quark matter and mesonic correlations
- Locating the special point of hybrid neutron stars
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- Dense Nuclear Matter Equation of State from Heavy-Ion Collisions
- What neutron stars tell about the hadron-quark phase transition: a Bayesian study
- Colour-Flavour Locked Quark Stars in Light of the Compact Object in HESS J1731-347 and the GW190814 Event
- Sound velocity peak and conformality in isospin QCD
- Effect of color superconductivity on the mass of hybrid neutron stars in an effective model with pQCD asymptotics
- Hybrid star phenomenology from the properties of the special point
- Curvature of the energy per particle in neutron stars
- The impact of asymmetric dark matter on the thermal evolution of nucleonic and hyperonic compact stars
- Thermal twin stars within a hybrid equation of state based on a nonlocal chiral quark model compatible with modern astrophysical observations
- Temperature and Strong Magnetic Field Effects in Dense Matter
- Novel Scalings of Neutron Star Properties from Analyzing Dimensionless Tolman--Oppenheimer--Volkoff Equations
- Comprehensive Analysis of Constructing Hybrid Stars with an RG-consistent NJL Model
- Constraining the onset density for the QCD phase transition with the neutrino signal from core-collapse supernovae
- Asymptotically conformal CFL quark matter within a nonlocal chiral quark model
- Phase transition and stiffer core fluid in neutron stars: Effects on stellar configurations, dynamical stability, and tidal deformability
- Fastest spinning millisecond pulsars: indicators for quark matter in neutron stars?
- Properties of the Object HESS J1731-347 as a Twin Compact Star
- Special point "trains" in the M-R diagram of hybrid stars
- Bayesian inference favors quark matter in neutron star interiors
- Rapidly Spinning Massive Pulsars as an Indicator of Quark Deconfinement
- How Neutron Star Observations Point Towards Exotic Matter: Existing Explanations and a Prospective Proposal
- Effects of a Brueckner-Hartree-Fock-corrected effective mass on speed of sound, conformality, and observables of dark matter-admixed neutron stars
- Speed of sound of QCD matter at chiral crossover