Massive neutron stars with holographic multiquark cores

Abstract

Phases of nuclear matter are crucial in the determination of physical properties of neutron stars~(NS). In the core of NS, the density and pressure become so large that the nuclear matter possibly undergoes phase transition into a deconfined phase, consisting of quarks and gluons and their colour bound states. Even though the quark-gluon plasma has been observed in ultra-relativistic heavy-ion collisions\cite{Gyulassy, Andronic}, it is still unclear whether exotic quark matter exists inside neutron stars. Recent results from the combination of various perturbative theoretical calculations with astronomical observations\cite{Demorest, Antoniadis} shows that (exotic) quark matter could exist inside the cores of neutron stars above 2.0 solar masses ($M_{\odot }$)~\cite{Annala:2019puf}. We revisit the holographic model in Ref.~\cite{bch, bhp} and implement the equation of states~(EoS) of multiquark nuclear matter to interpolate the pQCD EoS in the high-density region with the nuclear EoS known at low densities. For sufficiently large energy density scale~(${\epsilon }_s$) of the model, it is found that multiquark phase is thermodynamically prefered than the stiff nuclear matter above the transition points. The NS with holographic multiquark core could have masses in the range $1.96-2.23(1.64-2.10)M_{\odot }$ and radii $14.3-11.8(14.0-11.1)$ km for ${\epsilon }_s=26(28)$ GeV/fm${}^3$ respectively. Effects of proton-baryon fractions are studied for certain type of baryonic EoS; larger proton fractions could reduce radius of the NS with multiquark core by less than a kilometer.

arXiv comment14 pages, 8 figures, 1 table

References in corpus (45)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• Quark Gluon Plasma an Color Glass Condensate at RHIC? The perspective from the BRAHMS experiment
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
• GW190425: Observation of a Compact Binary Coalescence with Total Mass $\sim 3.4M_{\odot }$
• Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
• Color superconductivity in dense quark matter
• Low energy hadron physics in holographic QCD
• Properties of the binary neutron star merger GW170817
• New Forms of QCD Matter Discovered at RHIC
• Composition and Structure of Protoneutron Stars
• Equation of state and neutron star properties constrained by nuclear physics and observation
• More on a holographic dual of QCD
• Decoding the phase structure of QCD via particle production at high energy
• Evidence for quark-matter cores in massive neutron stars
• Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions
• Cold Quark Matter
• Neutron matter at next-to-next-to-next-to-leading order in chiral effective field theory
• Aspects of Large N Gauge Theory Dynamics as Seen by String Theory
• Neutron star radii and crusts: uncertainties and unified equations of state
• Peering into the dark side: magnesium lines establish a massive neutron star in PSR J2215+5135
• Evidence for a Massive Neutron Star from a Radial-Velocity Study of the Companion to the Black Widow Pulsar PSR B1957+20
• A 2.1 Solar Mass Pulsar Measured by Relativistic Orbital Decay
• A holographic model of deconfinement and chiral symmetry restoration
• Physical parameters of the high-mass X-ray binary 4U1700-37
• The mass of the neutron star in Vela X-1 and tidally induced non-radial oscillations in GP Vel
• Quantum Monte Carlo calculation of the equation of state of neutron matter
• Holographic Nuclear Physics
• Evolution of Proto-Neutron Stars with Quarks
• NNNLO pressure of cold quark matter: leading logarithm
• Three-loop HTL QCD thermodynamics
• PSR J1311-3430: A Heavyweight Neutron Star with a Flyweight Helium Companion
• Holographic quark matter and neutron stars
• Equation of State of hot and dense QCD: Resummed perturbation theory confronts lattice data
• A new baryonic equation of state at sub-nuclear densities for core-collapse simulations
• New equations of state based on the liquid drop model of heavy nuclei and quantum approach to light nuclei for core-collapse supernova simulations
• Gravitational Waves from Holographic Neutron Star Mergers
• 2FGL J1311.7-3429 Joins the Black Widow Club
• Supernova equations of state including full nuclear ensemble with in-medium effects
• Super-Massive Neutron Stars
• Constraints on the Compact Object Mass in the Eclipsing HMXB XMMU J013236.7+303228 in M33
• Thermodynamic Properties of Holographic Multiquark and the Multiquark Star
• Exotic Multi-quark States in the Deconfined Phase from Gravity Dual Models
• Holographic Magnetic Star

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• Slowly Rotating Neutron Star with Holographic Multiquark Core: I-Love-Q Relations
• Exploring the Phase Diagram of V-QCD with Neutron Star Merger Simulations
• Normal and Quasinormal Modes of Holographic Multiquark Star
• Deriving Neutron Star Equation of State from AdS/QCD
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