Four-Body Continuum with Three-Nucleon Forces

Viviani, M.; Girlanda, L.; Kievsky, A.; Marcucci, L. E.

doi:10.1007/978-3-030-32357-8_77

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“…We have disregarded them in this work. The effect of these additional electromagnetic interactions is the subject of a forthcoming paper [116].…”

Section: Resultsmentioning

confidence: 99%

Study of $n+{}^3$H, $p+{}^3$He, $p+{}^3$H, and $n+{}^3$He scattering with the HH method

Viviani,

Girlanda,

Kievsky

et al. 2020

Preprint

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The n + 3 H, p + 3 He, p + 3 H, and n + 3 He elastic and charge exchange reactions at low energies are studied by means of the hyperspherical harmonic method. The considered nuclear Hamiltonians include modern two-and three-nucleon interactions, in particular results are reported in case of chiral two-nucleon potentials, with and without the inclusion of chiral three-nucleon (3N) interactions. A detailed study of the convergence and numerical stability of the method is presented. We have found that the effect the 3N force is in general tiny except for p + 3 H scattering below the opening of the n + 3 He channel. In such a case, the effect of 3N forces is appreciable and a clear dependence on the cutoff used to regularize the high-momentum tail of the interactions is observed. Such a dependence is related to the presence of the poorly known sharp 0 + resonance, considered to be the first excited state of 4 He.

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“…We have disregarded them in this work. The effect of these additional electromagnetic interactions is the subject of a forthcoming paper [116].…”

Section: Resultsmentioning

confidence: 99%