Exploring New Physics with CP Violation in Neutral D and B Decays

Abstract

If New Physics contributes significantly to neutral meson mixing, then it is quite likely that it does so in a CP violating manner. In $D^0-{\bar{D}}^0$ mixing measured through $D^0\to K^{+}{\pi }^{-}$, CP violation induces a term $\propto t{e}^{-\Gamma t}$ with important implications for experiments. For $B_s-{\bar{B}}_s$ mixing, a non-vanishing CP asymmetry (above a few percent) $a_{CP}(B_s\to D_s^{+}{D}_s^{-})$ is a clear signal of New Physics. Interestingly, this would test precisely the same Standard Model ingredients as the question of whether $\alpha +\beta +\gamma =\pi$.

Comments: 11 pages, phyzzx, no figures, Talk given at the 6th International Symposium on Heavy Flavor Physics, Pisa, Italy