Subleading D-like Three-Nucleon Interactions
Nuclear Theory
2026-02-16 v1
Abstract
We consider subleading contributions to the three-nucleon force from tree-level diagrams involving a single-pion exchange and a contact interaction between two nucleons, which appear at fifth order in the chiral expansion. We show that the corresponding D-like three-nucleon potential depends on 16 low-energy constants, which need to be determined from few-body data. Assuming that their numerical values are governed by the intermediate {\Delta}(1232) excitation mechanism, the considered three-nucleon force can be approximated using 4 low-energy constants that parametrize the short-range nucleon-nucleon to nucleon-{\Delta} transition amplitude.
Cite
@article{arxiv.2602.12879,
title = {Subleading D-like Three-Nucleon Interactions},
author = {Henri Paul Huesmann and Hermann Krebs and Evgeny Epelbaum},
journal= {arXiv preprint arXiv:2602.12879},
year = {2026}
}