Few-body systems with [formula omitted] and −2

Abstract

The structure of the T = 1 iso-triplet hypernuclei, He Λ 7 , Li Λ 7 and Be Λ 7 within the framework of an α + Λ + N + N four-body cluster model is studied. A phenomenological Λ N charge symmetry breaking (CSB) interaction is introduced. The Λ binding energy of the ground state in He Λ 7 is predicted to be 5.16 ( 5.36 ) MeV with(without) the CSB interaction. The five-body cluster model calculation of α α n Λ Λ for Be Λ Λ 11 , which has been observed as Hida event, is performed. The calculated B Λ Λ is 18.23 MeV , which is less bound by about 2 MeV than the experimental data. The structure calculation in Li Ξ − 7 and Li Ξ − 10 are performed within the framework of α Ξ − n n and α α Ξ − n four-body model. Li Ξ − 7 and Li Ξ − 10 are predicted to have bound states. We propose to observe the bound states in future ( K − , K + ) experiments using 7Li and 10B targets in addition to the standard 12C target.