The decay τ-→ K*- η ν τ has been observed with the CLEO II detector. The K*- is reconstructed in two decay channels, K*-→ KSπ-→π+π- and K*-→ K-π0. The η is reconstructed from the decay η → γγ. The measured branching fraction isB(τ-→ K*-π η ντ)=(2.9 ± 0.8 ±0.4) × 10-44. We also measure the inclusive branching fractions without requiring the K* resonance, B(τ-→ KSπ- η ντ)=(1.10 ± 0.35 ±0.11) × 10-4 and B(τ-→ K-π0 η ντ)=(1.77 ± 0.56 ±0.71) × 10-4. The results indicate that the K*- resonance dominates the KSπ- mass spectrum.
ASJC Scopus subject areas
- Physics and Astronomy(all)