Searches for the light invisible axion-like particle in $K^{+}\to {\pi }^{+}{\pi }^{0}a$ decay

A. S. Sadovsky, A. P. Filin, S. A. Akimenko +31

A high statistics data sample of the $K^{+}$ decays is recorded by the OKA collaboration. A missing mass analysis is performed to search for a light invisible pseudoscalar axion-li…