Three-body structure of the $nnΛ$ system with $ΛN-ΣN$ coupling

The structure of the three-body $nnΛ$ system, which has been observed recently by the HypHI collaboration, is investigated taking $ΛN-ΣN$ coupling explicitly into account. The $YN$ and $NN$ interactions employed in this work reproduce the binding energies of $^3_Λ$H, $^4_Λ$H and $^4_Λ$He. We do not find any $^3_Λn$ bound state, which contradicts the interpretation of the data reported by the HypHI collaboration.

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