Probing CP Violation in $\tau ^- \to \nu (K\pi/K2\pi / 3K/ K3\pi)^- $ Decays

Abstract

It had been suggested to probe CP violation in {\tau} \rightarrow {\nu}K{\pi} decays with K0 -K ^{-}0 oscillation to produce ACP({\tau}- \rightarrow {\nu}KS{\pi}-) = (0.36\pm0.01)%. BaBar has found ACP({\tau}- \rightarrow {\nu}KS{\pi}-[\geq {\pi}0]) = (-0.36 \pm 0.23 \pm 0.11)% - i.e., 2.8 sigma difference with SM prediction. It is discussed, why one needs to probe ACP({\tau} \rightarrow {\nu}K{\pi}), ACP({\tau} \rightarrow {\nu}K2{\pi}) and ACP({\tau} \rightarrow {\nu}K3{\pi}) separately to establish the existence of New Dynamics and its features. It should be possible at SuperB & Super-Belle experiments.