Test of Charge Symmetry ofK+andK0Mesons in the Associated Production Process

The charge symmetry of $K^{+}$ and $K^0$ mesons has been tested by comparing ${\pi }^{+}$ and ${\pi }^{-}$ interactions at 1.23 BeV/c in the 72-in. deuterium bubble chamber. About 350 events of the type ${\pi }^{+}+d\to K^{+}+\Lambda (or {\Sigma }^0)+p$ and approximately 700 events of the type ${\pi }^{-}+d\to K^0+\Lambda (or {\Sigma }^0)+n$ have been compared. Total cross sections, angular distributions, momentum spectra, and lambda decay asymmetries show no deviations from charge symmetry. Details on angle-momentum distributions and decay asymmetries are given.