Cloud-Chamber Observations of Some Unusual NeutralVParticles Having Light Secondaries

From six cloud-chamber photographs of unusual $V^0$ decay events, the following conclusions are drawn: (1) there is a neutral $V$ particle that decays into two particles lighter than $\kappa$ mesons with a $Q$ value too small to be consistent with a ${\theta }^0(\pi , \pi , 214 \mathrm{Mev})$ particle; (2) some of these events cannot be explained in terms of the decay of a ${\tau }^0({\pi }^0, {\pi }^{-}, {\pi }^{+}, Q\sim 80 \mathrm{Mev})$ particle; (3) these events can be explained by any one of a number of three-body decay schemes, but two different types of $V$ particles must be postulated if two-body decays are assumed.