A study of tau decays involving eta and omega mesons

The 132 pb$^{-1}$ of data collected by ALEPH from 1991 to 1994 have been used to analyze $\eta$ and $\omega$ production in $\tau$ decays. The following branching fractions have been measured: \begin{eqnarray*} B(\tau^-\to\nu_{\tau}ømega h^-)&=& (1.91\pm 0.07\pm 0.06 )\times 10^{-2},\\ B(\tau^-\to\nu_{\tau}ømega h^-\pi^0)&=&(4.3\pm 0.6\pm 0.5)\times 10^{-3},\\ B(\tau^-\to\nu_{\tau} \eta K^-)&=&(2.9^{+1.3}_{-1.2}\pm 0.7)\times 10^{-4},\\ B(\tau^-\to\nu_{\tau}\eta h^-\pi^0)&=&(1.8\pm 0.4\pm 0.2)\times 10^{-3} \end{eqnarray*} and the 95\%~C.L. limit $B(\tau^-\to\nu_{\tau} \eta \pi^-)<6.2\times 10^{-4}$ has been obtained. The $\omega\pi^-$ and $\eta\pi^-\pi^0$ rates and dynamics are found in agreement with the predictions made from $e^+e^-$ annihilation data with the help of isospin invariance (CVC).