Observation of the doubly Cabibbo-suppressed decay ${\Xi }_c^{+}\to p\varphi$

LHCb collaboration, R. Aaij, C. Abellán Beteta +848

The doubly Cabibbo-suppressed decay ${\Xi }_c^{+}\to p\varphi$ with $\varphi \to K^{+}{K}^{-}$ is observed for the first time, with a statistical significance of more than fifteen standard deviation…