Microscopically constrained mean field models from chiral nuclear thermodynamics

Abstract

We explore the use of mean field models to approximate microscopic nuclear equations of state derived from chiral effective field theory across the densities and temperatures relevant for simu- lating astrophysical phenomena such as core-collapse supernovae and binary neutron star mergers. We consider both relativistic mean field theory with scalar and vector meson exchange as well as energy density functionals based on Skyrme phenomenology and compare to thermodynamic equa- tions of state derived from chiral two- and three-nucleon forces in many-body perturbation theory. Quantum Monte Carlo simulations of symmetric nuclear matter and pure neutron matter are used to determine the density regimes in which perturbation theory with chiral nuclear forces is valid. Within the theoretical uncertainties associated with the many-body methods, we find that select mean field models describe well microscopic nuclear thermodynamics. As an additional consistency requirement, we study as well the single-particle properties of nucleons in a hot/dense environment, which affect e.g., charged-current weak reactions in neutron-rich matter. The identified mean field models can be used across a larger range of densities and temperatures in astrophysical simulations than more computationally expensive microscopic models.

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Cited by in corpus (24)

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• Equation of state of nuclear and neutron matter at third-order in perturbation theory from chiral EFT
• Bayesian modeling of the nuclear equation of state for neutron star tidal deformabilities and GW170817
• New equations of state constrained by nuclear physics, observations, and QCD calculations of high-density nuclear matter
• Neutron star crusts from mean field models constrained by chiral effective field theory
• Constraining the relativistic mean-field model equations of state with gravitational wave observations
• Constraining the neutron-matter equation of state with gravitational waves
• Nuclear dipole polarizability from mean-field modeling constrained by chiral effective field theory
• Ab initio and phenomenological studies of the static response of neutron matter
• Non-perturbative Extraction of the Effective Mass in Neutron Matter
• Neutron Star Quantum Death by Small Black Holes
• Effective interactions of hyperons and mass-radius relation of neutron stars
• Hot and Dense Matter Equation of State Probability Distributions for Astrophysical Simulations
• Tensor Fermi liquid parameters in nuclear matter from chiral effective field theory
• Quantum Monte Carlo in Configuration Space with Three-Nucleon Forces
• The radius of a typical-mass neutron star and chiral effective field theory
• Satisfying the compressibility sum rule in neutron matter
• Temperature effects on the neutron matter equation of state obtained from chiral effective field theory
• Perturbed nuclear matter studied within Density Functional Theory with a finite number of particles
• Isospin-Asymmetry Dependence of the Thermodynamic Nuclear Equation of State in Many-Body Perturbation Theory
• Skyrme-based extrapolation for the static response of neutron matter
• Neutron matter at the interface(s): static response and effective mass