Searches for hidden sectors using $K^{+}\to \ddot{I}{€}^{+}X$ decays

NA62 Collaboration

Results from the study of the rare decays $K^{+}\to \ddot{I}{€}^{+}\hat{I}½\bar{\hat{I}}½$, $K^{+}\to \ddot{I}{€}^{+}\hat{I}{¼}^{+}\hat{I}{¼}^{-}$ and $K^{+}\to \ddot{I}{€}^{+}{\hat{I}}^3{\hat{I}}^3$ at the NA62 experiment at CERN are interpreted…