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arXiv · 2607.26958

Spectroscopic basis for short-range three-nucleon forces

Josep Solà Cava·Arseniy A. Filin·Sven Heihoff·Henri Paul Huesmann·Evgeny Epelbaum
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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.

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Josep Solà Cava, Arseniy A. Filin, Sven Heihoff, Henri Paul Huesmann, Evgeny Epelbaum. 2026-07-29. Spectroscopic basis for short-range three-nucleon forces. https://arxiv.org/abs/2607.26958

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