A new prediction for the binding energy of the 7ΛHe hypernucleus

P-shell A = 7 hypernuclei are considered in the cluster 5ΛHe + N + N model. The folding procedure using the OBE simulating (NSC97f) model for ΛN potential and various αΛ potentials are applied to construct the 5ΛHe-N interaction. Configuration space Faddeev calculations are performed for the hyperon binding energy of the 7ΛHe (1/2+) and 7ΛLi(1/2+ and 3/2+, T = 0) hypernuclei. The new predicted value for BΛ(7ΛHe) is 5.35 MeV. This value was obtained with the 6ΛHe(2-) excitation energy equal to 0.26 MeV. Since the 2- state of 6ΛHe has not yet been observed, the 6ΛHe(2-) excitation energy was chosen to reproduce the experimental value of the 7ΛLi(3/2+) excitation energy by the adjustment of the 5ΛHe-N effective potential. Our results are compared with those of Hiyama et al (1996 Phys. Rev. C 53 2075; 1999 Phys. Rev. C 59 2351)