The formation probabilities oF Σ-hypernuclei and the "unstable bound state"

Abstract

A formalism for treating the processes forming unstable states such as Σ-hypemuclear states is given. The formation probabilities are shown to be expressed by the Green function for the Σ in the nucleus. The formalism is used for examining the effects of the "unstable bound state" which has been proposed as a candidate for explaining the observed sharp Σ-hypernuclear states. © 1985.