Formation and Transition of Strangeness=-2 Nuclear Systems

概要

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A scenario is given for the formation of Ξ^- states and the transitions to states with double-Λ. First, the production cross sections of Ξ hypernuclear states by (K^-,K^+) reachions on typical two targets (^<12>C and ^<16>O) are calculated within the framework of the distorted-wave impulse approximation. Next, the transition rates from Ξ^- hypernuclear states to possible double-Λ states are evaluated, which are closely related to single- and double-Λ emission after Ξ^-p→ΛΛ conversion in nuclei. The partial conversion widths for the atomic Ξ^- absorption by ^<12>C and ^<16>O are also estimated in the similar way, discussing various possible final states. In order to extract an information an the Ξ-N interaction, the cross sections and Ξ state widths are given as a function of the Woods-Saxon well depth for the Ξ particle. The result is discussed in anticipation of observations in future experiments.
理論物理学刊行会の論文
1995-03-31