Various models of the K- nucleus potential have been compared and tested in fits to kaonic atom data. The calculations give basically two vastly different predictions for the depth of the K- optical potential at the nuclear density. The study of the (K-stop, \pi ) reaction could help to distinguish between K- optical potentials as the \Lambda -hypernuclear formation rates are sensitive to the details of the initial-state K- wave function.
PACS numbers: 24.10.Ht, 36.10.Gv
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