Probable Example of the DecayΣ0→Λ+e++e−in Nuclear Emulsion

Abstract

An event has been observed in nuclear emulsion which is attributed to the production of a ${\Sigma }^0$ hyperon and its subsequent decays via the mode ${\Sigma }^0\to \Lambda +e^{+}+e^{-}$. From the apparent concurrence of the tracks involved in the disintegrations, it has been deduced that the ${\Sigma }^0$ lifetime for this event is ${10}^{-14\mathrm{}}$ sec.