Consistency of ΛΛ hypernuclear events

Abstract

Highlights of ΛΛ emulsion events are briefly reviewed. Given three accepted events, shell-model predictions based on p-shell Λ hypernuclear spectroscopic studies are shown to reproduce $B_{\Lambda\Lambda}({_{\Lambda\Lambda}^{~10}{\rm Be}})$ and $B_{\Lambda\Lambda}({_{\Lambda\Lambda}^{~13}{\rm B}})$ in terms of $B_{\Lambda\Lambda}({_{\Lambda\Lambda}^{~~6}{\rm He}})$. Predictions for other species offer judgement on several alternative assignments of the $_{\Lambda\Lambda}^{~13}{\rm B}$ KEK-E176 event, and on the assignments $_{\Lambda\Lambda}^{~11}{\rm Be}$ and $_{\Lambda\Lambda}^{~12}{\rm Be}$ suggested recently for the KEK-E373 HIDA event. The predictions of the shell model, spanning a wide range of A values, are compared with those of cluster models, where the latter are available.