Study of NeutralVParticles Observed in a Multiplate Cloud Chamber

Abstract

In a series of pictures taken with a multiplate cloud chamber we have observed the decay of a number of neutral $V$ particles which originated in nuclear interactions produced inside the cloud chamber. Most of these $V$ particles were found to decay into a proton and a $\pi$-meson with a $Q$ value of 37 Mev. Strong evidence is presented to support the hypothesis that no neutral secondary particle is produced. The lifetime was found to be (3.5±1.2)×${10}^{-10\mathrm{}}$ second.