Neutron matter from local chiral effective field theory interactions at large cutoffs

Abstract

Neutron matter is an important many-body system that provides valuable constraints for the equation of state (EOS) of neutron stars. Neutron-matter calculations employing chiral effective field theory (EFT) interactions have been extensively used for this purpose. Among the various many-body methods, quantum Monte Carlo (QMC) methods stand out due to their nonperturbative nature and the achievable precision. However, QMC methods require local interactions as input, which leads to the appearance of stronger regulator artifacts compared to non-local interactions. To circumvent this, we employ large-cutoff interactions derived within chiral EFT ($400 \mev \leq Λ_c \leq 700 \mev$) for studies of pure neutron matter. These interactions have been adjusted to nucleon-nucleon scattering phase shifts, the triton binding energy, as well as the triton $\beta$-decay half-life. We find that regulator artifacts significantly decrease with increasing cutoff, leading to a significant reduction of uncertainties in the neutron-matter EOS. We discuss implications for the symmetry energy and demonstrate how our new calculations lead to a reduction in the theoretical uncertainty of predicted neutron-star radii by up to 30\% for low-mass stars.

8 pages, 3 figures

References in corpus (56)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• Multi-messenger Observations of a Binary Neutron Star Merger
• Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
• Modern Theory of Nuclear Forces
• 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
• Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
• Chiral effective field theory and nuclear forces
• A unified equation of state of dense matter and neutron star structure
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• Gravitational-wave constraints on the neutron-star-matter Equation of State
• Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
• Quantum Monte Carlo methods for nuclear physics
• Accurate Determination of the Neutron Skin Thickness of ${}^{208}$Pb through Parity-Violation in Electron Scattering
• Improved nuclear matter calculations from chiral low-momentum interactions
• Improved chiral nucleon-nucleon potential up to next-to-next-to-next-to-leading order
• Chiral three-nucleon forces and neutron matter
• Neutron matter at next-to-next-to-next-to-leading order in chiral effective field theory
• Stringent constraints on neutron-star radii from multimessenger observations and nuclear theory
• Constraining the speed of sound inside neutron stars with chiral effective field theory interactions and observations
• Renormalization of One-Pion Exchange and Power Counting
• Chiral interactions up to next-to-next-to-next-to-leading order and nuclear saturation
• How well do we know the neutron-matter equation of state at the densities inside neutron stars? A Bayesian approach with correlated uncertainties
• Quantum Monte Carlo Calculations with Chiral Effective Field Theory Interactions
• Symmetry Parameter Constraints From A Lower Bound On The Neutron-Matter Energy
• Chiral Three-Nucleon Interactions in Light Nuclei, Neutron-$\alpha$ Scattering, and Neutron Matter
• A NICER View of the Nearest and Brightest Millisecond Pulsar: PSR J0437$\unicode{x2013}$4715
• The equation of state for dense nucleonic matter from a metamodeling. I. Foundational aspects
• Three-Nucleon Low-Energy Constants from the Consistency of Interactions and Currents in Chiral Effective Field Theory
• Local chiral effective field theory interactions and quantum Monte Carlo applications
• A Constrained Path Quantum Monte Carlo Method for Fermion Ground States
• Minimally non-local nucleon-nucleon potentials with chiral two-pion exchange including $\Delta$'s
• Astrophysical Constraints on the Symmetry Energy and the Neutron Skin of ${}^{208}$Pb with Minimal Modeling Assumptions
• Quantum Monte Carlo calculations of neutron matter with chiral three-body forces
• The equation of state for dense nucleonic matter from a meta-modeling. II. Predictions for neutron stars properties
• Multimessenger constraints for ultra-dense matter
• Light-nuclei spectra from chiral dynamics
• Quantifying uncertainties and correlations in the nuclear-matter equation of state
• Direct Astrophysical Tests of Chiral Effective Field Theory at Supranuclear Densities
• Quantum Monte Carlo Methods in Nuclear Physics: Recent Advances
• Auxiliary field diffusion Monte Carlo calculations of light and medium-mass nuclei with local chiral interactions
• Properties of nuclei up to $A=16$ using local chiral interactions
• Nuclear and neutron-star matter from local chiral interactions
• Constraining the dense matter equation of state with new NICER mass-radius measurements and new chiral effective field theory inputs
• Nuclear equation of state for arbitrary proton fraction and temperature based on chiral effective field theory and a Gaussian process emulator
• An updated nuclear-physics and multi-messenger astrophysics framework for binary neutron star mergers
• Benchmark calculations of pure neutron matter with realistic nucleon-nucleon interactions
• Constraints on the nuclear symmetry energy from asymmetric-matter calculations with chiral NN and 3N interactions
• Regulator Artifacts in Uniform Matter for Chiral Interactions
• Analyzing the Fierz Rearrangement Freedom for Local Chiral Two-Nucleon Potentials
• Weinberg eigenvalues for chiral nucleon-nucleon interactions
• Nuclear incompressibility and sound speed in uniform matter and finite nuclei
• Maximally local two-nucleon interactions at N${}^3$LO in $\Delta$-less chiral effective field theory
• Large-cutoff behavior of local chiral effective field theory interactions

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• The nucleardatapy toolkit for simple access to experimental nuclear data, astrophysical observations, and theoretical predictions
• Bayesian approach for many-body uncertainties in nuclear structure: Many-body perturbation theory for finite nuclei
• Connecting Relativistic Density Functional Theory to Microscopic Calculations
• Neutron star crust and outer core equation of state from chiral effective field theory with quantified uncertainties
• Constraining Hamiltonians from chiral effective field theory with neutron-star data
• Examining the possibility of a thick crust in the compact stellar object HESS J1731-347