Shell-model predictions for double-Lambda hypernuclei

TL;DR

This paper uses shell-model calculations to predict Lambda-Lambda separation energies in hypernuclei, aiding the interpretation of experimental events and advancing understanding of hypernuclear interactions.

Contribution

It introduces a reliable method to deduce Lambda-Lambda separation energies using recent shell-model determinations of Lambda-N interactions.

Findings

Predicted Lambda-Lambda separation energies across the p shell.

Comparison with experimental data, including KEK-E373 Hida event.

Identification of candidate hypernuclei for observed events.

Abstract

It is shown how the recent shell-model determination of Lambda-N spin dependent interaction terms in Lambda hypernuclei allows for a reliable deduction of Lambda-Lambda separation energies in Lambda-Lambda hypernuclei across the nuclear p shell. Comparison is made with the available data, highlighting 11(Lambda-Lambda)Be and 12(Lambda-Lambda)Be which have been suggested as possible candidates for the KEK-E373 Hida event.