Shell-model calculations for p-shell hypernuclei

TL;DR

This paper reviews shell-model calculations for p-shell hypernuclei, focusing on Lambda-Sigma coupling effects, specific hypernuclei cases, and potential experimental measurements, with a brief discussion on extending models to sd-shell hypernuclei.

Contribution

It introduces shell-model calculations including Lambda-Sigma coupling for p-shell hypernuclei and explores their application to specific hypernuclei and experimental feasibility.

Findings

Lambda 8Li, Lambda 8Be, and Lambda 9Li exhibit notable Lambda-Sigma coupling features.

Feasibility of measuring ground-state doublet spacing of Lambda 10Be is analyzed.

Extension of shell-model calculations to sd-shell hypernuclei is discussed.

Abstract

The interpretation of hypernuclear gamma-ray data for p-shell hypernuclei in terms of shell-model calculations that include the coupling of Lambda- and Sigma-hypernuclear states is briefly reviewed. Next, Lambda 8Li, Lambda 8Be, and Lambda 9Li are considered, both to exhibit features of Lambda-Sigma coupling and as possible source of observed, but unassigned, hypernuclear gamma rays. Then, the feasibility of measuring the ground-state doublet spacing of Lambda 10Be, which, like Lambda 9Li, could be studied via the (K-,pi0 gamma) reaction, is investigated. Structural information relevant to the population of states in these hypernuclei in recent (e,e'K+) studies is also given. Finally, the extension of the shell-model calculations to sd-shell hypernuclei is briefly considered.