First Observation of the Decay τ- → K*-η ντ

CLEO Collaboration

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)281-285
Number of pages5
JournalPhysical Review Letters
Issue number2
StatePublished - 1999

ASJC Scopus subject areas

  • General Physics and Astronomy


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