Neutron-rich hypernuclei in the chiral soliton model

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 ≤ ∼10. This effect becomes stronger with increasing isospin of nuclides, and for the “nuclear variant” of the model with rescaled Skyrme constant e. Binding energies of Λ 8 He and recently discovered Λ 6 H satisfactorily agree with data. Hypernuclei Λ 7 H, Λ 9 He are predicted to be bound stronger in comparison with their nonstrange analogues 7H, 9He; hypernuclei Λ 10 Li, Λ 11 LI, Λ 12 Be, Λ 13 Be, etc. are bound stronger in the nuclear variant of the model.