Deformation of hypernuclei studied with antisymmetirzed molecular dynamics

TL;DR

This paper extends antisymmetrized molecular dynamics to analyze hypernuclei structure, revealing how $ ext{Λ}$ particles in different states influence nuclear deformation and exploring phenomena like parity inversion.

Contribution

It introduces an extended antisymmetrized molecular dynamics framework to study p-sd shell hypernuclei with effective $ ext{Λ}N$ interactions, highlighting deformation effects.

Findings

$ ext{Λ}$ in p-wave enhances nuclear deformation

$ ext{Λ}$ in s-wave reduces nuclear deformation

Potential parity inversion in $^{20}_ ext{Λ}$Ne

Abstract

An extended version of the antisymmetrized molecular dynamics to study structure of $p$-$sd$ shell hypernuclei is developed. By using an effective $\Lambda N$ interaction, we investigate energy curves of $^9_\Lambda$Be, $^{13}_\Lambda$C and $^{20,21}_\Lambda$Ne as function of nuclear quadrupole deformation. Change of nuclear deformation caused by $\Lambda$ particle is discussed. It is found that the $\Lambda$ in p-wave enhances nuclear deformation, while that in s-wave reduces it. This effect is most prominent in $^{13}_\Lambda$C. The possibility of the parity inversion in $^{20}_\Lambda$Ne is also examined.