A study of τ decays involving η and ω mesons

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Abstract

The 132 pb-1 of data collected by ALEPH from 1991 to 1994 have been used to analyze η and ω production in τ decays. The following branching fractions have been measured: B(τ- → ντωh-) = (1.91 ± 0.07 ± 0.06) × 10-2, B(τ- → ντωh-π0) = (4.3 ± 0.6 ± 0.5) × 10-3, B(τ- → ντηK-) = (2.9-1.2+1.3 ± 0.7) × 10-4, B(τ- → ντηh-π0) = (1.8 ± 0.4 ± 0.2) × 10-3 and the 95% C.L. limit B(τ- → ντηπ-) < 6.2 × 10-4 has been obtained. The ωπ- and ηπ-π0 rates and dynamics are found in agreement with the predictions made from e+e- annihilation data with the help of isospin invariance (CVC). © Springer-Verlag 1997.
Original languageEnglish
Pages (from-to)263-273
JournalZeitschrift fur Physik C-Particles and Fields
Volume74
Issue number2
DOIs
Publication statusPublished - 1 Apr 1997

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