First observation of τ → 3πηντ and τ → f1 πντ decays

CLEO Collaboration

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

We have observed new channels for τ decays with an η in the final state. We study 3-prong tau decays, using the η → γγ and η → 3π0 decay modes and 1-prong decays with two π0’s using the η → γγ channel. The measured branching fractions are B(τ → πππ+ηντ = (3.4+0.6-0.5 ± 0.6) × 10-4 and B(τ → π0ηντ = (1.4 ± 0.6 ± 0.3) × 10-4. We observe clear evidence for f1 → ηππ substructure and measure B(τ → f1πντ) = (5.8+1.4-1.3 ± 1.8) × 10-4. We have also searched for η′(958) production and obtain 90% C.L. upper limits B(τ → πη′ντ) < 7.4 × 10-5 and B(τ → ππ0η′ντ) < 8.0 × 10-5.

Original languageEnglish (US)
Pages (from-to)2406-2410
Number of pages5
JournalPhysical Review Letters
Volume79
Issue number13
DOIs
StatePublished - Sep 29 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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