English

Chiral three-nucleon forces for the new local position-space two-nucleon potential in $\textit{ab initio}$ many-body calculations

Nuclear Theory 2026-01-14 v1 High Energy Astrophysical Phenomena Nuclear Experiment

Abstract

Three-nucleon force (3NF) plays an important role in understanding the structure of finite nuclei and the saturation properties of infinite nuclear matter. The chiral 3NF derived from the chiral effective field theory has been successful in ab initio\textit{ab initio} studies of atomic nuclei. However, challenges remain, such as parameterizing low-energy constants and applying regulators. Most of established chiral nuclear forces have a nonlocal form in the momentum space. In this work, we construct local and hybrid local-nonlocal chiral 3NFs for the newly established Idaho local position-space two-nucleon potential, and calculate binding energies and radii of nuclei up to 132^{132}Sn. The two low-energy constants of 3NF are constrained by the ground-state energies of 3^3H and 16^{16}O, as suggested in a recent work. The chiral Hamiltonian obtained with the local-nonlocal regulator can simultaneously reproduce the experimental ground-state energies and charge radii of nuclei over a large range from 4^4He to 132^{132}Sn.

Keywords

Cite

@article{arxiv.2601.08199,
  title  = {Chiral three-nucleon forces for the new local position-space two-nucleon potential in $\textit{ab initio}$ many-body calculations},
  author = {Rongzhe Hu and Jianguo Li and Siqin Fan and Furong Xu},
  journal= {arXiv preprint arXiv:2601.08199},
  year   = {2026}
}

Comments

7 pages, 6 figures; Submitted for publication