Associated Production of Σ0 and θ20; Mass of the Σ0

Abstract

An event in which ${{\theta }_2}^0$ and ${\Sigma }^0$ production and decay are both observed, is described. This event yields a mass value for the ${\Sigma }^0$ and demonstrates the associated production of the ${{\theta }_2}^0$. Additional events yielding mass values of the ${\Sigma }^0$ are reported.