Spectroscopic basis for short-range three-nucleon forces

2026/07/29 by Josep Solà Cava, Arseniy A. Filin, Sven Heihoff +2
Physics and Astronomy · #nucl-th #hep-ph #nucl-ex

paper · pdf

26 pages, 19 figures, 5 tables

arxiv created 2026/07/29 · arxiv updated 2026/07/30

Abstract

We introduce a spectroscopic basis for the subleading contact three-nucleon forces, which allows one to classify these interactions according to the total angular momentum and parity quantum numbers in a transparent way. Using this new basis, we explore the sensitivity of nucleon-deuteron observables to the three-nucleon short-range interactions. The low dimensionality of the variable-parameter space in the spectroscopic basis allows us to build a simple nucleon-deuteron scattering emulator using radial basis function interpolation. We perform exploratory fits of the subleading contact three-nucleon interactions and demonstrate that 9 of 13 low-energy constants can be reliably determined from elastic nucleon-deuteron scattering data.

Citations

• Semi-local nuclear forces from chiral EFT: State-of-the-art & challenges

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