Six-body variational Monte Carlo study of ΛΛ6He -: art. no. 061001

Variational Monte Carlo calculations are carried out for He-6(LambdaLambda) using realistic NN, NNN, and phenomenological LambdaN and LambdaNN interactions. For the LambdaLambda interaction we employ the various phase equivalent Nijmegen interactions. By incorporating the various components of Lambda-nuclear interactions in stages, and keeping B-Lambda(He-5(Lambda)) around 3.12 MeV, it is demonstrated that the incremental energy DeltaB(LambdaLambda) for He-6(LambdaLambda) is sensitive to the three-body LambdaNN force and the exchange part of the LambdaN interaction. The LambdaLambda interaction obtained is only somewhat weaker than the LambdaN interaction. We also report the results for the rearrangement energy of the alpha core. We discuss the implications of our results.