CP Violation in $\tau$ Decays at SuperB \& Super-Belle Experiments -- like Finding Signs of Dark Matter

Abstract

BaBar has found $A_{\mathrm{CP}}({\tau }^{-}\to \nu K_S{\pi }^{-}[\ge {\pi }^0])=(-0.36\pm 0.23\pm 0.11)$ with 2.8 $\sigma$ difference with SM prediction $A_{\mathrm{CP}}({\tau }^{-}\to \nu K_S{\pi }^{-})=(0.36\pm 0.01)$ based on $K^0-{\bar{K}}^0$ oscillation. Four central points: (i) to establish both the `existence' of New Dynamics (ND) and its `features' in local CP asymmetries; (ii) to increase the number of final states to be probed; (iii) to emphasize correlations of CP violations between different final states; (iv) likewise for the correlations with $D^{\pm }$ final states. These measurements should be possible at SuperB & Belle II experiments.

Comments: 7 pages; talk given at Tau2012 Workshop at Nagoya (Japan)