First Observation of the Decay tau^- -> phi K^- nu_tau

Details First Observation of the Decay tau^- -> phi K^- nu_tau First Observation of the Decay tau^- -> phi K^- nu_tau

2006-09-10

arxiv.org/abs/hep-ex/0609018v2

Phys.Lett.B643:5-10,2006

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages, 7 figures, submitted to Phys. Lett. B

Scientific paper

10.1016/j.physletb.2006.10.027

We present the first observation of tau lepton decays to hadronic final
states with a phi-meson. This analysis is based on 401 fb^-1 of data
accumulated at the Belle experiment. The branching fraction obtained is B(tau-
-> phi K- nu) = (4.05 +- 0.25 +- 0.26) x 10^-5.

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