Abstract
In addition to the one-pion-exchange ΛN→NN process with a weak ΛNπ and a strong NNπ vertex, the ΛN→ΣN→NN process is considered, where the ΛN-ΣN coupling is induced mainly by π exchange. For the weak ΛNπ and ΣNπ vertices, the empirical values are used along with the SU3 symmetry and the ΔI=1/2 rule. The closure approximation is employed for the intermediate ΣN state. The form factors and the initial and final correlations are taken into account. Calculations are done for the [Formula: see text] hypernucleus.
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