Gamow shell model description of neutron-rich He hyper-isotopes

TL;DR

This paper extends the Gamow shell model to study neutron-rich He hyper-isotopes, successfully predicting energy spectra and resonant states, demonstrating its effectiveness for weakly bound hypernuclear systems near drip lines.

Contribution

The paper introduces the application of the Gamow shell model to hypernuclei, providing a new computational approach for weakly bound and unbound hypernuclear states.

Findings

Good agreement with experimental energy spectra

Prediction of neutron-emitting resonant states in He hyper-isotopes

Long-range one-neutron densities in weakly bound states

Abstract

The Gamow shell model (GSM) framework has been extended to the study of weakly bound hypernuclei. As a first application, the neutron-rich He hyper-isotope chains, from 6{\Lambda}He to 9{\Lambda}He have been investigated to accurately account for the loosely bound or neutron-unbound character of hypernuclear many-body states. The energy spectra calculated with a phenomenological Hamiltonian show good agreement with experimental data. In particular, neutron-emitting resonant states are predicted for the neutron-rich nuclei 5-7He and the hypernucleus 6{\Lambda}He. Furthermore, one-neutron densities exhibit the long-range character of weakly bound and resonant states. This study demonstrates that GSM is a practical tool for describing the complex structure of hypernuclei, especially for those close to drip lines.