# A study of tau decays involving eta and omega mesons

Abstract : 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).
Document type :
Journal articles

Cited literature [9 references]

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Submitted on : Thursday, March 11, 1999 - 10:53:02 AM
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### Identifiers

• HAL Id : in2p3-00010778, version 1

### Citation

D. Buskulic, I. de Bonis, D. Decamp, P. Ghez, C. Goy, et al.. A study of tau decays involving eta and omega mesons. Zeitschrift für Physik C Particles and Fields, Springer Verlag, 1997, 74, pp.263-273. ⟨in2p3-00010778⟩

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