Lee-Yang-inspired energy-density functional including contributions from $p$-wave scattering

Abstract

The ELYO functional proposed in [M. Grasso, D. Lacroix, and C. J. Yang, Phys. Rev. C \textbf{95}, 054327 (2017)] belongs to the family of energy-density functionals (EDFs) inspired by effective-field theories (EFTs) and constrained by \textit{ab--initio} pseudo-data. We present here an extension of this EDF which also accounts for the first $p$-wave term appearing in the low-density expansion from which it derives. It is shown that this enrichment of the ansatz on which the functional is based leads to a significant improvement of the description of neutronic systems, especially in regimes besides the pseudo--data set employed to adjust the parameters. As an illustrative application, the mass-radius relation of neutron stars is considered. In contrast to its initial version, the new functional predicts values which are qualitatively consistent with recent observations.

arXiv comment10 pages, 8 figures, 2 tables

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Cited by in corpus (7)

• Unveiling the correlations of tidal deformability with the nuclear symmetry energy parameters
• Application of an ab-initio-inspired energy density functional to nuclei: impact of the effective mass and the slope of the symmetry energy on bulk and surface properties
• From odd-even staggering to the pairing gap in neutron matter
• Satisfying the compressibility sum rule in neutron matter
• Finite-temperature infinite matter with effective-field-theory-inspired energy-density functionals
• Calculations for nuclear matter and finite nuclei within and beyond energy--density--functional theories through interactions guided by effective field theory
• Skyrme-based extrapolation for the static response of neutron matter