Abstract

Results are reviewed on the systematic study of Σ hypernuclei with (stopped K−, π±) reactions performed by Tokyo group. Formation and decay properties of Σ hypernuclei obtained from 12C(K−, π+) and 4He(K−, π±) reactions are summarized. The first observation of the Σ hypernuclear bound state (Σ4He) and information of isospin/spin dependence of Σ-nucleus interaction from the 4He data are discussed in detail and they are compared with recent theoretical estimations.

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