Quark-Nuclear Hybrid EoS with Excluded Volume Effects

Abstract

A two-phase description of the quark-nuclear matter hybrid equation of state that takes into account the effect of excluded volume in both the hadronic and the quark matter phases is introduced. The nuclear phase manifests a reduction of the available volume as density increases, leading to a stiffening of the matter. The quark matter phase displays a reduction of the effective string tension in the confining density functional from available volume contributions. The nuclear equation of state is based upon the relativistic density functional model DD2 with excluded volume. The quark matter is based upon a mean-field modification to the free fermi gas and will be discussed in greater detail. The interactions are decomposed into mean scalar and vector components. The scalar interaction is motivated by a string potential between quarks, whereas the vector interaction potential is motivated by higher order interactions of quarks leading to an increased stiffening at high densities. As an application, we consider matter under compact star constraints of electric neutrality and $\beta$-equilibrium. We obtain mass-radius relations for hybrid stars that form a third family, disconnected from the purely hadronic star branch, and fulfill the $2M_{\odot }$ constraint.

12 pages, 18 figures, two figures added and others remastered, text and references added, typos removed

References in corpus (9)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• A new quark-hadron hybrid equation of state for astrophysics - I. High-mass twin compact stars
• Relativistic model for nuclear matter and atomic nuclei with momentum-dependent self-energies
• Lattice QCD Constraints on the Nuclear Equation of State
• Massive hybrid stars with a first order phase transition
• Neutron star mass limit at $2M_{\odot }$ supports the existence of a CEP
• Stable configurations of hybrid stars with colour-flavour-locked core
• Interactions of multi-quark states in the chromodielectric model

Cited by in corpus (80)

• Identifying a first-order phase transition in neutron star mergers through gravitational waves
• Implications from GW170817 and I-Love-Q relations for relativistic hybrid stars
• Gravitational waves from neutron star mergers and their relation to the nuclear equation of state
• Quark deconfinement as supernova explosion engine for massive blue-supergiant stars
• Equation of state constraints from the threshold binary mass for prompt collapse of neutron star mergers
• Third family of compact stars within a nonlocal chiral quark model equation of state
• Equation of state for hot QCD and compact stars from a mean field approach
• Constraining the onset density of the hadron-quark phase transition with gravitational-wave observations
• High-mass twin stars with a multi-polytrope EoS
• Systematics of prompt black-hole formation in neutron star mergers
• 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
• Core-collapse Supernova Explosions Driven by the Hadron-quark Phase Transition as a Rare $r$-process Site
• Quark-nuclear hybrid equation of state for neutron stars under modern observational constraints
• Core-collapse supernova simulations and the formation of neutron stars, hybrid stars, and black holes
• Chiral symmetry restoration by parity doubling and the structure of neutron stars
• Tidal deformability and other global parameters of compact stars with strong phase transitions
• Equation-of-state Constraints and the QCD Phase Transition in the Era of Gravitational-Wave Astronomy
• Equations of state for hot neutron stars -- II. The role of exotic particle degrees of freedom
• First-order phase transition from hypernuclear matter to deconfined quark matter obeying new constraints from compact star observations
• Robustness of third family solutions for hybrid stars against mixed phase effects
• Maximum mass and universal relations of rotating relativistic hybrid hadron-quark stars
• Towards a Unified Quark-Hadron Matter Equation of State for Applications in Astrophysics and Heavy-Ion Collisions
• EoS for hot neutron stars
• Phenomenological quark-hadron equations of state with first-order phase transitions for astrophysical applications
• On stability of a neutron star system in Palatini gravity
• Universal relations for rapidly rotating cold and hot hybrid star
• Polytropic stars in Palatini gravity
• Holographic approach to compact stars and their binary mergers
• Toward a unified equation of state for multi-messenger astronomy
• Parity Doubling and the Dense Matter Phase Diagram under Constraints from Multi-Messenger Astronomy
• Recovering the conformal limit of color superconducting quark matter within a confining density functional approach
• Net-baryon number fluctuations in the Hybrid Quark-Meson-Nucleon model at finite density
• Vector interactions inhibit quark-hadron mixed phases in neutron stars
• The special point on the hybrid star mass--radius diagram and its multi--messenger implications
• The Role of the Hadron-Quark Phase Transition in Core-Collapse Supernovae
• Exploring thermal effects of the hadron-quark matter transition in neutron star mergers
• Astrophysical aspects of general relativistic mass twin stars
• Hadron matter in neutron stars in view of gravitational wave observations
• A Bayesian analysis of the properties of hybrid stars with the NJL model
• Progenitor Dependence of Hadron-quark Phase Transition in Failing Core-collapse Supernovae
• Speed of Sound in Hybrid Stars and the Role of Bag Pressure in the Emergence of Special Points on M-R Variation of Hybrid Stars
• QCD phase transition drives supernova explosion of a very massive star
• Effect of color superconductivity on the mass of hybrid neutron stars in an effective model with pQCD asymptotics
• Bayesian Analysis for Extracting Properties of the Nuclear Equation of State from Observational Data including Tidal Deformability from GW170817
• Massive Neutron Stars with a Color Superconducting Quark Matter Core
• Hybrid star phenomenology from the properties of the special point
• Neutron Star Mergers Chirp About Vacuum Energy
• The fate of twin stars on the unstable branch: implications for the formation of twin stars
• Frequencies of $f$- and $p$-oscillation modes in cold and hot compact stars
• Thermal twin stars within a hybrid equation of state based on a nonlocal chiral quark model compatible with modern astrophysical observations
• A Detailed Analysis of the Special Points on $M-R$ Solutions of Hybrid (Twin) Stars
• Constraining free parameters of a color superconducting non-local Nambu-Jona-Lasinio model using Bayesian analysis of neutron stars mass and radius measurements
• Hybrid stars with reactive interfaces: analysis within the Nambu-Jona-Lasinio model
• Accretion-induced collapse to third family compact stars as trigger for eccentric orbits of millisecond pulsars in binaries
• Cold dense quark matter with phenomenological medium effects: a self-consistent formulation of the quark-mass density-dependent model
• Nambu-Jona-Lasinio description of hadronic matter from a Bayesian approach
• Hard-core Radius of Nucleons within the Induced Surface Tension Approach
• Exploiting stellar explosion induced by the QCD phase transition in large-scale neutrino detectors
• Bayesian analysis of hybrid neutron star EOS constraints within an instantaneous nonlocal chiral quark matter model
• Constraining the onset density for the QCD phase transition with the neutrino signal from core-collapse supernovae
• Neutron stars in accreting systems -- signatures of the QCD phase transition
• Impact of Rotation on the Multimessenger Signatures of a Hadron-quark Phase Transition in Core-collapse Supernovae
• Locating the special point of hybrid neutron stars
• Exploring pathways to forming twin stars
• Confining density functional approach for color superconducting quark matter and mesonic correlations
• Mixed Phase within the Multi-polytrope Approach to High Mass Twins
• Bayesian Quantification of Observability and Equation of State of Twin Stars
• A unified quark-nuclear matter equation of state from the cluster virial expansion within the generalized Beth-Uhlenbeck approach
• Investigating the Impact of Higher-Order Phase Transitions in Binary Neutron-Star Mergers
• Strange matter in compact stars
• Quark deconfinement in compact stars through sexaquark condensation
• Properties of the Object HESS J1731-347 as a Twin Compact Star
• Implementation of Cluster expansion for hot QCD matter
• The chiral phase transition and equation of state in the chiral imbalance
• Occurrence of fast neutrino flavor conversions in QCD phase-transition supernovae
• Density functional approach to quark matter with confinement and color superconductivity
• Quantifying the Information Gain from Future High-Precision Radius Measurements for Identifying Twin Neutron Stars
• Recurring region for neutron-star observables
• A new class of hybrid EoS with multiple critical endpoints for simulations of supernovae, neutron stars and their mergers