A Ξ^- particle is captured by a nitrogen-14 nucleus at point A, forming a Ξ hypernucleus, which then decays into a beryllium-10Λ hypernucleus (#1) and a helium-5Λ hypernucleus (#2). The beryllium-10Λ nucleus decays into several nuclei (#3-#6) and a few neutrons (not seen) at point B, whereas the helium-5Λ nucleus decays into a helium-4 nucleus (#7), a pion (#8), and a proton (#9) at point C.