Hyperonic mixing in five-baryon double-strangeness hypernuclei in a two-channel treatment

Abstract

Properties of hypernuclei ${}_{\Lambda \Lambda }^5$H and ${}_{\Lambda \Lambda }^5$He are studied in a two-channel approach with explicit treatment of coupling of channels ^3\text{Z}+Λ+Λand α+Ξ. Diagonal ΛΛand coupling ΛΛ-ΞN interactions are derived within G-matrix procedure from Nijmegen meson-exchange models. Bond energy ΔB_{ΛΛ} in ${}_{\Lambda \Lambda }^5$He exceeds significantly that in ${}_{\Lambda \Lambda }^5$H due to the channel coupling. Diagonal Ξαattraction amplifies the effect, which is sensitive also to Λ-core interaction. The difference of the ΔB_{ΛΛ} values can be an unambiguous signature of the ΛΛ-ΞN coupling in ΛΛhypernuclei. However, improved knowledge of the hyperon-nucleus potentials is needed for quantitative extraction of the coupling strength from future data on the ΛΛhypernuclear binding energies.

11 pages with 3 figures; Phys. Rev. C, accepted

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Cited by in corpus (11)

• Strangeness in nuclear physics
• Extended-soft-core Baryon-Baryon Model II. Hyperon-Nucleon Interaction
• Production of excited double hypernuclei via Fermi breakup of excited strange systems
• Full-Coupled Channel Approach to Doubly Strange $s$-Shell Hypernuclei
• Production of doubly strange hypernuclei via Ξ- doorways in the 16O(K-, K+) reaction at 1.8 GeV/c
• Cluster models of Lambda-Lambda-6He and Lambda-9Be hypernuclei
• Lambda-Lambda hypernuclei and stranger systems
• $\Lambda \Lambda$-$\Xi N$-$\Sigma \Sigma$ coupling in ${}_{\Lambda \Lambda }^6$He with the Nijmegen soft-core potentials
• S-shell $\Lambda \Lambda$ hypernuclei based on chiral interactions
• Consistency of Lambda-Lambda hypernuclear events
• ${}_{\Lambda \Lambda }^5$H and ${}_{\Lambda \Lambda }^5$He Hypernuclei reexamined in Halo/Cluster Effective Theory