Study of CP Violation in Flavor Tagged and Untagged $D^0\to K^{-}{\pi }^{+}$ Decays

Abstract

We review $CP$-violating observables in flavor tagged and untagged $D^0\to K^{-}{\pi }^{+}$ decays and evaluate the $CP$ asymmetry difference between the two decays. We note that this commonly neglected difference is not zero in principle and can be significant in future $B$ factory experiments. We also construct an expression to extract the strong phase difference between ${\bar{D}}^0\to K^{-}{\pi }^{+}$ and $D^0\to K^{-}{\pi }^{+}$ decays, independently of existing experimental methods.

Comments: 1 figure, 1 table