A search for the dark photon in the OKA experiment

The OKA Collaboration, A. S. Sadovsky, A. P. Filin +35

A search for the massless dark photon in the decay $K^{+}\to \ddot{I}{€}^{+}\ddot{I}{€}^0\overline{{\hat{I}}^3}$ is performed with the OKA detector exposed to 17.7 GeV/c RF separated secondary beam of t…