Widths ofΣ-Hypernuclear States

Abstract

The widths of states of $\Sigma$-hypernuclei have been estimated in two models. Widths as small as one to a few megaelectronvolts are found, a result which should hold for some isolated simple $\Sigma$-hypernuclear states. The standard procedure by use of the two-body absorptive cross section is shown to overestimate the width by one or more orders of magnitude.