Observeration of Radiative Leptonic Decay of the Tau Lepton

Details Observeration of Radiative Leptonic Decay of the Tau Lepton Observeration of Radiative Leptonic Decay of the Tau Lepton

1999-07-28

arxiv.org/abs/hep-ex/9907056v1

Physics

High Energy Physics

High Energy Physics - Experiment

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

Scientific paper

Using 4.68 fb^{-1} of e^+e^- annihilation data collected with the CLEO II detector we have studied tau radiative decays tau --> mu nu nu gamma and tau --> e nu nu gamma. For a 10 MeV minimum photon energy in the tau rest frame, the branching fraction of a tau radiatively decaying to a muon is measured to be (3.61+-0.16+-0.35)*10^{-3}, and to an electron is (1.75+-0.06+-0.17)*10^{-2}. The branching fractions are in agreement with the Standard Model theoretical predictions. All quoted results are preliminary.

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