Measurement of the doubly Cabibbo suppressed decay $D^0\to K^{+}{\pi }^{-}$ and a search for charm mixing

FOCUS Collaboration, J. M. Link

We present an analysis of the decay $D^0\to K^{+}{\pi }^{-}$ based on FOCUS data. From a sample of 234 signal events, we find a branching ratio of $\frac{Γ(D^0 \to K^+π^-)}{Γ(D^0 \to K^-π^…