Different relative parity assignments are shown to lead to distinguishable angular distributions in the $K^{+}+K^{+}+{\overline{K}}^0$ annihilation mode of unpolarized (${\overline{\Sigma }}^{-}, p$) systems. An impact parameter argument is used to limit consideration to the two cases $\lambda , l=0, 1$ and $\lambda , l=0, 1, 2$, where $\lambda$ denotes the relative angular momentum of the $2K^{+}$ system and $l$, that of the ${\overline{K}}^0$ with respect to the center of mass of the $2K^{+}$ system.

• Received 29 September 1959

DOI:https://doi.org/10.1103/PhysRev.117.1402