First Observation of the Decay ${\tau }^{-}\to K^{\ast -}\eta {\nu }_{\tau }$

M. Bishai

Using data recorded by the CLEO-II detector at CESR, we report the first measurement of the branching fraction for the decay of ${\tau }^{-}$ into $K^{\ast -}\eta {\nu }_{\tau }$. The measured branching frac…