Four-body structure of neutron-rich hypernucleus $^6_Λ$H

The structure of heavy hyperhydrogen $^6_Λ$H is studied within the framework of a $tnnΛ$ four-body cluster model. Interactions among the constituent subunits are determined so as to reproduce reasonably well the observed low-energy properties of the $tn, tΛ$ and $tnn$ subsystems. As long as we reproduce the energy and width of $^5$H within the error bar, the ground state of $^6_Λ$H is obtained as a resonant state.

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