Variational Monte Carlo Study of _ΛΛ⁴H

Variational Monte Carlo calculations are carried out for _ΛΛ⁴H to explore the possibility of its existence, using realistic NN, NNN, and phenomenological ΛN and ΛNN interactions. We also perform calculations using FGNNand NSC97 ΛN potentials, and demonstrate the effect of the exchange part of the two-body ΛN interaction and three-body ΛNN interaction on the binding energy of _ΛΛ⁴H. Still the stability of _ΛΛ⁴H remains an open question and this hypernuclear system has to be explored more theoretically.