Title

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

Document Type

Article

Publication Date

1-1-1999

Abstract

The decay τ → K η ν τ has been observed with the CLEO II detector. The K is reconstructed in two decay channels, K → K π →π π and K → K π . The η is reconstructed from the decay η → γγ. The measured branching fraction isB(τ → K π η ν )=(2.9 ± 0.8 ±0.4) × 10 4. We also measure the inclusive branching fractions without requiring the K resonance, B(τ → K π η ν )=(1.10 ± 0.35 ±0.11) × 10 and B(τ → K π η ν )=(1.77 ± 0.56 ±0.71) × 10 . The results indicate that the K resonance dominates the K π mass spectrum. © 2000 The American Physical Society. - *- *- *- - + - *- - 0 - *- -4 * - - -4 - - 0 -4 *- - S τ S τ τ S

Publication Name

Physical Review Letters

Volume Number

82

First Page

281

Last Page

285

Issue Number

2

DOI

10.1103/PhysRevLett.82.281

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