Neutron Star Equation of State with Nucleon Short-Range Correlations: A Concise Review and Open Issues

Abstract

Nucleon short-range correlations (SRCs) and the associated high-momentum tail (HMT) in its momentum distribution $n(k)$ represent a universal feature of strongly interacting Fermi systems. In nuclear matter, SRCs arise primarily from the spin-isospin dependence of the tensor and short-range components of the nucleon-nucleon interaction, leading to a substantial depletion of its Fermi sea and a characteristic $k^{-4}$ tail populated predominantly by isosinglet neutron-proton pairs. These microscopic structures modify both the kinetic and interaction contributions to the Equation of State (EOS) of dense matter and thereby influence a broad range of neutron-star (NS) properties. This short review provides a streamlined overview of how SRC-induced changes in $n(k)$ reshape the kinetic EOS, including its symmetry energy part and how these effects propagate into macroscopic NS observables, including mass-radius relations, tidal deformabilities, direct Urca thresholds and core-crust transition. We summarize key existing results, highlight current observational constraints relevant for testing SRC-HMT effects, and outline open questions for future theoretical, experimental, and multimessenger studies of dense nucleonic matter.

24-page invited review article for Modern Phys. Lett. A

References in corpus (176)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Many-Body Physics with Ultracold Gases
• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• The equation of state for nucleon matter and neutron star structure
• GW170817: Measurements of Neutron Star Radii and Equation of State
• Theory of ultracold Fermi gases
• 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
• A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
• Neutron Star Structure and the Equation of State
• GW190425: Observation of a Compact Binary Coalescence with Total Mass $\sim 3.4M_{\odot }$
• A New Parameterization for the Lagrangian Density of Relativistic Mean Field Theory
• Determination of the Equation of State of Dense Matter
• Color superconductivity in dense quark matter
• Neutron Star Observations: Prognosis for Equation of State Constraints
• Masses, Radii, and Equation of State of Neutron Stars
• Recent Progress and New Challenges in Isospin Physics with Heavy-Ion Reactions
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• Equations of state for supernovae and compact stars
• Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
• Isospin Asymmetry in Nuclei and Neutron Stars
• From hadrons to quarks in neutron stars: a review
• Constraints on the symmetry energy and neutron skins from experiments and theory
• Large momentum part of fermions with large scattering length
• Energetics of a strongly correlated Fermi gas
• Accurate Determination of the Neutron Skin Thickness of ${}^{208}$Pb through Parity-Violation in Electron Scattering
• The NANOGrav 11-year Data Set: High-precision timing of 45 Millisecond Pulsars
• Neutrino Emission from Neutron Stars
• PSR J0952-0607: The Fastest and Heaviest Known Galactic Neutron Star
• QCD and strongly coupled gauge theories: challenges and perspectives
• Relativistic Mean-Field Theory and the High-Density Nuclear Equation of State
• Self-consistent Green's function method for nuclei and nuclear matter
• Determination of the stiffness of the nuclear symmetry energy from isospin diffusion
• Probing Cold Dense Nuclear Matter
• Measuring the neutron star equation of state using X-ray timing
• Electron-Ion Collider in China
• Generalized Virial Theorem and Pressure Relation for a strongly correlated Fermi gas
• Nucleon-Nucleon Correlations, Short-lived Excitations, and the Quarks Within
• Circumstantial evidence for a soft nuclear symmetry energy at supra-saturation densities
• Neutrino Interactions in Hot and Dense Matter
• Momentum sharing in imbalanced Fermi systems
• Symmetry Energy II: Isobaric Analog States
• Low Mass Neutron Stars and the Equation of State of Dense Matter
• Realistic Model of the Nucleon Spectral Function in Few- and Many- Nucleon Systems
• Measurement of 2- and 3-Nucleon Short Range Correlation Probabilities in Nuclei
• A NICER View of the Nearest and Brightest Millisecond Pulsar: PSR J0437$\unicode{x2013}$4715
• Neutron Stars and the Nuclear Equation of State
• Evidence for the Strong Dominance of Proton-Neutron Correlations in Nuclei
• Gravitational waves from neutron star mergers and their relation to the nuclear equation of state
• Inclusive quasi-elastic electron-nucleus scattering
• Effects of Strong and Electromagnetic Correlations on Neutrino Interactions in Dense Matter
• Short Range Correlations and the EMC Effect
• Progress in Constraining Nuclear Symmetry Energy Using Neutron Star Observables Since GW170817
• An updated mass-radius analysis of the 2017-2018 NICER data set of PSR J0030+0451
• Towards Understanding Astrophysical Effects of Nuclear Symmetry Energy
• Nucleon Effective Masses in Neutron-Rich Matter
• New measurements of high-momentum nucleons and short-range structures in nuclei
• Investigation of Proton-Proton Short-Range Correlations via the 12C(e,e'pp) Reaction
• Dark Matter Effects On Neutron Star Properties
• Dense Nuclear Matter Equation of State from Heavy-Ion Collisions
• Epsilon expansion for a Fermi gas at infinite scattering length
• Chiral Effective Field Theory and the High-Density Nuclear Equation of State
• Symmetry energy of dilute warm nuclear matter
• Dark halos around neutron stars and gravitational waves
• Modified Structure of Protons and Neutrons in Correlated Pairs
• Hard probes of short-range nucleon-nucleon correlations
• Recent observation of short range nucleon correlations in nuclei and their implications for the structure of nuclei and neutron stars
• Properties of the QCD Matter -- An Experimental Review of Selected Results from RHIC BES Program
• Neutron stars at the dark matter direct detection frontier
• Nuclear Pasta Formation
• Probing the Repulsive Core of the Nucleon-Nucleon Interaction via the 4He(e,e'pN) Triple-Coincidence Reaction
• The dark matter effect on realistic equation of state in neutron stars
• Symmetry Energy of Nucleonic Matter With Tensor Correlations
• Quenching of single-particle strength from direct reactions with stable and rare-isotope beams
• The Radius of PSR J0740+6620 from NICER with NICER Background Estimates
• Improved Treatment of Dark Matter Capture in Neutron Stars
• Universal Fermi gases in mixed dimensions
• Locating the inner edge of neutron star crust using terrestrial nuclear laboratory data
• Astromaterial Science and Nuclear Pasta
• Density and isospin asymmetry dependence of high-momentum components
• The nuclear symmetry energy and stability of matter in neutron star
• The Equation of State for the Nucleonic and Hyperonic Core of Neutron Stars
• Critical Density and Impact of $\Delta (1232)$ Resonance Formation in Neutron Stars
• Depletion of the nuclear Fermi sea
• Generalized nuclear contacts and the nucleon's momentum distributions
• Scale and Scheme Independence and Position-Momentum Equivalence of Nuclear Short-Range Correlations
• Nuclear symmetry energy and the role of the tensor force
• Dark matter interactions with muons in neutron stars
• Theoretical and Experimental Constraints for the Equation of State of Dense and Hot Matter
• Nuclear matter fourth-order symmetry energy in the relativistic mean field models
• Dark matter admixed neutron star as a possible compact component in the GW190814 merger event
• Pairing in high-density neutron matter including short- and long-range correlations
• Pairing in high-density neutron matter including short- and long-range correlations
• Nucleon Structure and Strong Interactions in Dark Matter Capture in Neutron Stars
• New Properties of High Momentum Distribution of Nucleons in Asymmetric Nuclei
• Higher-order symmetry energy and neutron star core-crust transition with Gogny forces
• Symmetry energy of cold nucleonic matter within a relativistic mean field model encapsulating effects of high momentum nucleons induced by short-range correlations
• Phase transitions in neutron stars and their links to gravitational waves
• Spin-Down of Neutron Stars and Compositional Transitions in the Cold Crustal Matter
• Progress in understanding short-range structure in nuclei: an experimental perspective
• The neutron star mass, distance, and inclination from precision timing of the brilliant millisecond pulsar J0437$-$4715
• Correlated Fermion Pairs in Nuclei and Ultracold Atomic Gases
• Dark Matter or Regular Matter in Neutron Stars? How to tell the difference from the coalescence of compact objects
• New Results on Short-Range Correlations in Nuclei
• Future Physics Perspectives on the Equation of State from Heavy Ion Collisions to Neutron Stars
• Higher-order symmetry energy of nuclear matter and the inner edge of neutron star crusts
• Thermal properties of asymmetric nuclear matter with an improved isospin- and momentum-dependent interaction
• Constraints on the skewness coefficient of symmetric nuclear matter within the nonlinear relativistic mean field model
• Density-dependent nucleon-nucleon interaction from three-nucleon forces
• Phase Transition Study meets Machine Learning
• Analytical relations between nuclear symmetry energy and single-nucleon potentials in isospin asymmetric nuclear matter
• Effects of short-range correlation reduced kinetic symmetry energy in heavy-ion collisions at intermediate energies
• High momentum components in the nuclear symmetry energy
• Quantifying short-range correlations in nuclei
• Revealing the short-range structure of the "mirror nuclei" ${}^3$H and ${}^3$He
• Evidence for high excitation energy resonances in the 7 alpha disassembly of ${}^{28}$Si
• The isospin quartic term in the kinetic energy of neutron-rich nucleonic matter
• Short range correlations and the isospin dependence of nuclear correlation functions
• Short-range correlations effects on the deformability of neutron stars
• Probing short-range correlations in the deuteron via incoherent diffractive $J/\psi$ production with spectator tagging at the EIC
• Dark matter component in hadronic models with short-range correlations
• Nucleon-nucleon correlations and the single-particle strength in atomic nuclei
• Atmospheric Effects on Neutron Star Parameter Constraints with NICER
• Properties of the QCD Matter: A Review of Selected Results from the ALICE Experiment
• The interplay of short-range correlations and nuclear symmetry energy in hard photon productions from heavy-ion reactions at Fermi energies
• Thermodynamic properties and shear viscosity over entropy density ratio of nuclear fireball in a quantum-molecular dynamics model
• Role of nucleonic Fermi surface depletion in neutron star cooling
• Constraining nucleon high momentum in nuclei
• Extracing the number of short-range corerlated nucleon pairs from inclusive electron scattering data
• Lorentz covariant nucleon self-energy decomposition of the nuclear symmetry energy
• Production of exotic hadrons in $pp$ and nuclear collisions
• Ab initio short-range-correlation scaling factors from light to medium-mass nuclei
• Counting the number of correlated pairs in a nucleus
• Dark matter effects on the properties of neutron stars: optical radii
• Shear viscosity of hot nuclear matter by the mean free path method
• Shear viscosity of nucleonic matter
• Impact of Symmetry Energy on Sound Speed and Spinodal Decomposition in Dense Neutron-Rich Matter
• Isospin composition of the high-momentum fluctuations in nuclei from asymptotic momentum distributions
• Nuclear matter fourth-order symmetry energy in non-relativistic mean-field models
• Electromagnetic fields in ultra-peripheral relativistic heavy-ion collisions
• Density matrix expansion for the MDI interaction
• Shear viscosity to entropy density ratio in the Boltzmann-Uehling-Uhlenbeck model
• Shear viscosity of neutron-rich nucleonic matter near its liquid-gas phase transition
• Nucleon momentum distributions in asymmetric nuclear matter
• Phase-space distributions of nuclear short-range correlations
• Probing proton transition momentum in neutron-rich matter
• Do short-range correlations cause the nuclear EMC effect in the deuteron?
• Thermal and transport properties in central heavy-ion reactions around a few hundred MeV/nucleon
• Impact of fragment formation on shear viscosity in the nuclear liquid-gas phase transition region
• Proton-skins in momentum space and neutron-skins in coordinate space in heavy nuclei
• The Intrabinary Shock and Companion Star of Redback Pulsar J2215+5135
• Impacts of symmetry energy slope on the oscillation frequencies of neutron stars with short-range correlation and admixed dark matter
• Short-Range Correlations and Urca Process in Neutron Stars
• Short range correlations in the extended quantum molecular dynamics model
• Novel Scalings of Neutron Star Properties from Analyzing Dimensionless Tolman--Oppenheimer--Volkoff Equations
• Role of nucleon-nucleon correlation in transport coefficients and gravitational-wave-driven $r$-mode instability of neutron stars
• Effects of the high-momentum tail of nucleon momentum distribution on the isospin-sensitive observables
• Measuring Recoiling Nucleons from the Nucleus with the Electron Ion Collider
• Reconstruction of Bremsstrahlung $\gamma$-rays Spectrum in Heavy Ion Reactions with Richardson-Lucy Algorithm
• Nucleon Effective E-Mass in Neutron-Rich Matter from the Migdal-Luttinger Jump
• Investigating Effects of Relativistic Kinematics, Dimensionality, Interactions, and Short-Range Correlations on the Ratio of Quartic over Quadratic Nuclear Symmetry Energies
• Equation of State of Neutron-Rich Matter in $d$-Dimensions
• Implications of Fermionic Dark Matter Interactions on Anisotropic Neutron Stars
• Short-range correlations and momentum distributions in mirror nuclei 3H and 3He
• A novel nuclear dependence of nucleon-nucleon short-range correlations
• Nuclear contacts of unstable nuclei
• Revealing Dark Matter's Role in Neutron Stars Anisotropy: A Bayesian Approach Using Multi-messenger Observations
• An Analytic Characterization of the Limb Asymmetry -- Transit Time Degeneracy
• Precise Measurement of Short-Range Correlations in Nuclei from Bremsstrahlung Gamma Ray Emission in Low-Energy Heavy-Ion Collisions
• Illuminating dark matter admixed in neutron stars with simultaneous mass-radius constraints
• The Mass of Short-Range Correlated Nucleon
• Effects of nucleon-nucleon short-range correlation and symmetry energy on the evolution of newly born magnetars
• Investigating the pion emission source in pp collisions using the AMPT model with sub-nucleon structure
• Do short range correlations inhibit the appearance of the nuclear pasta?
• Recent astrophysical observations reproduced by a short-range correlated van der Waals-type model?