Neutron Rich Hypernuclei in Chiral Soliton Model

TL;DR

This paper estimates the binding energies of neutron-rich hypernuclei with strangeness S=-1 using the chiral soliton model, predicting additional binding effects and comparing results with experimental data.

Contribution

It introduces a novel application of the chiral soliton approach to neutron-rich hypernuclei, including predictions for binding energies of various hypernuclei.

Findings

Total binding energies of LambdaHe-8 and LambdaH-6 agree with experimental data.

Hypernuclei LambdaH-7 and LambdaHe-9 are predicted to be more strongly bound than their nonstrange counterparts.

The model predicts stronger binding for several other neutron-rich hypernuclei.

Abstract

The binding energies of neutron rich strangeness $S=-1$ hypernuclei are estimated in the chiral soliton approach using the bound state rigid oscillator version of the SU(3) quantization model. Additional binding of strange hypernuclei in comparison with nonstrange neutron rich nuclei takes place at not large values of atomic (baryon) numbers, $A=B\leq\sim 10$. This effect becomes stronger with increasing isospin of nuclides, and for "nuclear variant" of the model with rescaled Skyrme constant $e$. Total binding energies of (Lambda)He-8 and recently discovered (Lambda)H-6 satisfactorily agree with experimental data. Hypernuclei (Lambda)H-7, (Lambda)He-9 are predicted to be bound stronger in comparison with their nonstrange analogues H-7, He-9; hypernuclei (Lambda)Li-10, (Lambda)Li-11, (Lambda)Be-12, (Lambda)Be-13, etc. are bound stronger in the nuclear variant of the model.