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arXiv · 1211.6381

Auxiliary Field Diffusion Monte Carlo study of the Hyperon-Nucleon interaction in $Λ$-hypernuclei

D. Lonardoni·F. Pederiva·S. Gandolfi
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Abstract

We investigate the role of two- and three-body $Λ$-nucleon forces by computing the ground state of a few $Λ$-hypernuclei with the Auxiliary Field Diffusion Monte Carlo algorithm. Calculations have been performed for masses up to A=41, including some open-shell hypernuclei. The results show that the use of a bare hyperon-nucleon force fitted on the available scattering data yields a consistent overestimate of the $Λ$-separation energy $B_Λ$. The inclusion of a hyperon-nucleon-nucleon interaction systematically reduces $B_Λ$, leading to a qualitatively good agreement with experimental data over the range of masses investigated.

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D. Lonardoni, F. Pederiva, S. Gandolfi. 2012-11-27. Auxiliary Field Diffusion Monte Carlo study of the Hyperon-Nucleon interaction in $Λ$-hypernuclei. https://doi.org/10.1016/j.nuclphysa.2012.12.001

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