Phenomenological QCD equations of state for neutron star dynamics: Nuclear-2SC continuity and evolving effective couplings

Abstract

We delineate the quark-hadron continuity by constructing QCD equations of state for neutron star dynamics, covering the wide range of charge chemical potential (${\mu }_Q$) and temperatures ($T$). Based on the nuclear-2SC continuity scenario, we match equations of state for nuclear and two-flavor color-superconducting (2SC) quark matter, where the matching baryon density is $n_B\simeq 1.5n_0$ ($n_0\simeq 0.16\mathrm{f}{\mathrm{m}}^{-3}$: nuclear saturation density). The effective vector and diquark couplings in a quark matter model evolve as functions of $n_B,{\mu }_Q,T$, whose low density values are constrained by the nuclear matter properties and neutron star radii, with the high density behavior by the two-solar mass ($2M_{\odot }$) constraint. With couplings dependent on $n_B$, we examined how smooth the nuclear-2SC continuity can be, and found problems in matching nuclear and 2SC entropies at low temperatures. To proceed with the continuity scenario, we enforce smooth matching by making the couplings ($n_B,{\mu }_Q,T$)-dependent. In effect, this adds phenomenological contributions which we call "X". After the phenomenological matching, we take the rest as our predictions. The 2SC and color-flavor-locked (CFL) phases computed with these evolving couplings are called 2SCX and CFLX. The CFLX appears around $n_B\simeq 2$-$4n_0$ and, in contrast to the conventional CFL, has non-negligible dependence on $({\mu }_Q,T)$. To examine the astrophysical consequences of our modeling, we add charged leptons and neutrinos, and study the composition of matter for lepton fractions relevant for protoneutron stars and neutron star mergers. The abundance of neutrinos and thermal effects reduce the strangeness fraction and stiffen equations of state. For a neutrino trapped neutron star at $T\simeq 30$ MeV with a lepton fraction $Y_L\simeq 0.05$, the mass is larger than its cold static counterpart by $\sim 0.1M_{\odot }$.

arXiv comment23 pages, 16 figures; v2, 24 pages, 16 figures, published in PRD

References in corpus (86)

• A Massive Pulsar in a Compact Relativistic Binary
• The equation of state for nucleon matter and neutron star structure
• 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
• Properties of the binary neutron star merger GW170817
• Equations of state for supernovae and compact stars
• Gravitational-wave constraints on the neutron-star-matter Equation of State
• The phase diagram of dense QCD
• Composition and thermodynamics of nuclear matter with light clusters
• Chiral effective model with the Polyakov loop
• Relativistic Equation of State of Nuclear Matter for Supernova and Neutron Star
• Neutron Star Cooling
• From hadrons to quarks in neutron stars: a review
• Phases of Dense Quarks at Large N_c
• Core-collapse supernova equations of state based on neutron star observations
• Evidence for quark-matter cores in massive neutron stars
• Inhomogeneous Superconductivity in Condensed Matter and QCD
• Tidal Deformabilities and Radii of Neutron Stars from the Observation of GW170817
• The NANOGrav 11-year Data Set: High-precision timing of 45 Millisecond Pulsars
• Minimal Cooling of Neutron Stars: A New Paradigm
• Polyakov loop, diquarks and the two-flavour phase diagram
• Nuclear Force from Lattice QCD
• Measuring the neutron star equation of state using X-ray timing
• Generic conditions for stable hybrid stars
• Signatures of quark-hadron phase transitions in general-relativistic neutron-star mergers
• Constraining the speed of sound inside neutron stars with chiral effective field theory interactions and observations
• Continuity of Quark and Hadron Matter
• Quarkyonic Matter and Neutron Stars
• Sound velocity bound and neutron stars
• Inhomogeneous chiral condensates
• Quarkyonic Chiral Spirals
• A new quark-hadron hybrid equation of state for astrophysics - I. High-mass twin compact stars
• On the importance of viscous dissipation and heat conduction in binary neutron-star mergers
• Chiral symmetry and density wave in quark matter
• The Crystallography of Color Superconductivity
• Hadron-Quark Crossover and Massive Hybrid Stars with Strangeness
• New Critical Point Induced by the Axial Anomaly in Dense QCD
• Nuclear equation of state for core-collapse supernova simulations with realistic nuclear forces
• New Neutron Star Equation of State with Quark-Hadron Crossover
• An Infrared Safe perturbative approach to Yang-Mills correlators
• Phenomenological QCD equation of state for massive neutron stars
• Evolution of Proto-Neutron Stars with Quarks
• Core-collapse supernova explosions triggered by a quark-hadron phase transition during the early post-bounce phase
• Limiting masses and radii of neutron stars and their implications
• Hadron-Quark Crossover and Massive Hybrid Stars
• The superfluid phases of quark matter: Ginzburg-Landau theory and color neutrality
• Quark deconfinement as supernova explosion engine for massive blue-supergiant stars
• $N\Omega$ dibaryon from lattice QCD near the physical point
• Equation of state constraints from the threshold binary mass for prompt collapse of neutron star mergers
• Tables of Hyperonic Matter Equation of State for Core-Collapse Supernovae
• Quarkyonic Matter Equation of State in Beta-Equilibrium
• New class of hybrid EoS and Bayesian M-R data analysis
• Phase structure, collective modes, and the axial anomaly in dense QCD
• A new temperature dependent hyperonic equation of state: application to rotating neutron star models and I-Q-relations
• Interweaving Chiral Spirals
• Dynamical Derivation of the Momentum Space Shell Structure for Quarkyonic Matter
• Hyperon stars at finite temperature in the Brueckner theory
• The Quarkyonic Star
• Evolution of a proto-neutron star with a nuclear many-body equation of state: Neutrino luminosity and gravitational wave frequencies
• Hard-core deconfinement and soft-surface delocalization from nuclear to quark matter
• Covering the Fermi Surface with Patches of Quarkyonic Chiral Spirals
• Equation of state for neutron stars with hyperons by the variational method
• Hyperon Puzzle, Hadron-Quark Crossover and Massive Neutron Stars
• Unequal Mass Binary Neutron Star Simulations with Neutrino Transport: Ejecta and Neutrino Emission
• Hyperons in hot dense matter: what do the constraints tell us for equation of state?
• Excluded-volume model for quarkyonic Matter: Three-flavor baryon-quark Mixture
• Finite-Temperature Quarkyonic Matter with an Excluded Volume Model
• Effective repulsion in dense quark matter from non-perturbative gluon exchange
• Functional renormalization group study of the Quark-Meson model with $\omega$ meson
• Excluded-volume model for quarkyonic matter II: Three-flavor shell-like distribution of baryons in phase space
• Impact of Quarks and Pions on Dynamics and Neutrino Signal of Black Hole Formation in Non-rotating Stellar Core Collapse
• Phenomenological neutron star equations of state: 3-window modeling of QCD matter
• Gluon propagator in two-color dense QCD: Massive Yang-Mills approach at one-loop
• Chiral density wave versus pion condensation at finite density
• A field theoretical model for quarkyonic matter
• Continuity from neutron matter to two-flavor quark matter with ${}^1{S}_0$ and ${}^3{P}_2$ superfluidity
• Exploring Hadron Physics in Black Hole Formations: a New Promising Target of Neutrino Astronomy
• Absence of Landau-Peierls Instability in the Magnetic Dual Chiral Density Wave Phase of Dense QCD
• Baryon-baryon interactions at short distances -- constituent quark model meets lattice QCD
• Hadron-Quark Crossover and Hot Neutron Stars at Birth
• Chiral Spirals from Noncontinuous Chiral Symmetry: The Gross-Neveu model results
• Lepton-rich cold QCD matter in protoneutron stars
• Pseudo Nambu-Goldstone modes in neutron stars

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