First Observation of the Decay tau- -> phi K- nutau
Belle colaboration
Abstract
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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