CVC and \tau \rightarrow \eta(\eta^\prime)\pi^{-}\pi^{0}\nu_{\tau}

Abstract

We use experimental data on $e^{+}{e}^{-}\to \eta {\pi }^{+}{\pi }^{-}$ and ${\tau }^{-}\to \eta {\pi }^{-}{\pi }^0{\nu }_{\tau }$ to test conservation of vector current (CVC) by comparing the predicted hadronic spectrum and branching fraction with the $\tau$ decay data. Based on the corresponding $e^{+}{e}^{-}$ data and CVC, we also calculate the branching fraction of ${\tau }^{-}\to {\eta }^{\prime }{\pi }^{-}{\pi }^0{\nu }_{\tau }$ decay.

Comments: 6 pages, 5 figures, Talk at The 11th International Workshop on Tau Lepton Physics Manchester, UK, 13-17 September 2010