Observation of Radiative Leptonic Decay of the Tau Lepton

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

1999-09-28

arxiv.org/abs/hep-ex/9909050v2

Phys.Rev.Lett.84:830-834,2000

Physics

High Energy Physics

High Energy Physics - Experiment

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

Scientific paper

10.1103/PhysRevLett.84.830

Using 4.68 fb^{-1} of e^+e^- annihilation data collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR) 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 radiative tau decay to a muon or electron is measured to be (3.61+-0.16+-0.35)*10^{-3} or (1.75+-0.06+-0.17)*10^{-2}, respectively. The branching fractions are in agreement with the Standard Model theoretical predictions.

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