2003/11/24 by D. E. Lanskoy, Y. Yamamoto, Yasuo Yamamoto · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.69.014303
published as Phys.Rev. C69 (2004) 014303 · 11 pages with 3 figures; Phys. Rev. C, accepted
arxiv created 2003/11/24 · openalex publication_date 2004/01/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Properties of hypernuclei _\ensuremathΛ\ensuremathΛ5H and _\ensuremathΛ\ensuremathΛ5He are studied in a two-channel approach with explicit treatment of coupling of channels 3Z+\ensuremathΛ+\ensuremathΛ and \ensuremathα+\ensuremathΞ. Diagonal \ensuremathΛ\ensuremathΛ and coupling \ensuremathΛ\ensuremathΛ\ensuremath-\ensuremathΞN interactions are derived within G-matrix procedure from Nijmegen meson-exchange models. Bond energy \ensuremathΔB_\ensuremathΛ\ensuremathΛ in _\ensuremathΛ\ensuremathΛ5He exceeds significantly that in _\ensuremathΛ\ensuremathΛ5H due to the channel coupling. Diagonal \ensuremathΞ\ensuremathα attraction amplifies the effect, which is sensitive also to \ensuremathΛ-core interaction. The difference of the \ensuremathΔB_\ensuremathΛ\ensuremathΛ values can be an unambiguous signature of the \ensuremathΛ\ensuremathΛ\ensuremath-\ensuremathΞN coupling in \ensuremathΛ\ensuremathΛ hypernuclei. However, improved knowledge of the hyperon-nucleus potentials is needed for quantitative extraction of the coupling strength from future data on the \ensuremathΛ\ensuremathΛ hypernuclear binding energies.