Observation of the Singly Cabibbo-Suppressed Decay $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^{-}{K}^{+}\ddot{I}{€}^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +616

The singly Cabibbo-suppressed decay $\hat{I}{›}_c^{+}\to \hat{I}{\pounds }^{-}{K}^{+}\ddot{I}{€}^{+}$ is observed for the first time with a statistical significance of $6.4\ddot{I}ƒ$ by using 4.5 fb${}^{-1}$ of $e^{+}{e}^{-}$ c…