Update of the Search for the Neutrinoless Decay $τ\to μγ$

Details Update of the Search for the Neutrinoless Decay $τ\to μγ$ Update of the Search for the Neutrinoless Decay $τ\to μγ$

1999-08-06

arxiv.org/abs/hep-ex/9908025v1

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS

Scientific paper

We present an update of the search for the lepton family number violating decay $\tau \to \mu\gamma$ using a complete CLEO II data sample of 12.6 million $\tau^+\tau^-$ pairs. No evidence of a signal has been found and the corresponding upper limit is $ \BR(\tau \to \mu\gamma) < 1.0 \times 10^{-6} $ at 90% CL, significantly smaller than previous limits. All quoted results are preliminary.

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