Observation of radiative leptonic decay of the tau lepton

CLEO Collaboration

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Using 4.68 fb−1 of e+e annihilation data collected with the CLEO II detector at the Cornell Electron Storage Ring, we have studied τ radiative decays τ→ντμν¯μγ and τ-→ντeν¯eγ. For a 10 MeV minimum photon energy in the τ rest frame, the branching fraction for radiative τ 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 standard model theoretical predictions.

Original languageEnglish (US)
Pages (from-to)830-834
Number of pages5
JournalPhysical Review Letters
Issue number5
StatePublished - 2000

ASJC Scopus subject areas

  • General Physics and Astronomy


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