@article{5f7f63de0ca94e939e5a55251e0b5fe9,
title = "Observation of radiative leptonic decay of the tau lepton",
abstract = "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−→ντμ−ν¯μγ and τ-→ντe−ν¯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.",
author = "{CLEO Collaboration} and T. Bergfeld and Eisenstein, {B. I.} and J. Ernst and Gladding, {G. E.} and Gollin, {G. D.} and Hans, {R. M.} and E. Johnson and I. Karliner and Marsh, {M. A.} and M. Palmer and C. Plager and C. Sedlack and M. Selen and Thaler, {J. J.} and J. Williams and Edwards, {K. W.} and R. Janicek and Patel, {P. M.} and Sadoff, {A. J.} and R. Ammar and P. Baringer and A. Bean and D. Besson and R. Davis and S. Kotov and I. Kravchenko and N. Kwak and X. Zhao and S. Anderson and Frolov, {V. V.} and Y. Kubota and Lee, {S. J.} and R. Mahapatra and O{\textquoteright}neill, {J. J.} and R. Poling and T. Riehle and A. Smith and S. Ahmed and Alam, {M. S.} and Athar, {S. B.} and L. Jian and L. Ling and Mahmood, {A. H.} and M. Saleem and S. Timm and F. Wappler and A. Anastassov and M. Artuso and T. Skwarnicki and S. Stone",
year = "2000",
doi = "10.1103/PhysRevLett.84.830",
language = "English (US)",
volume = "84",
pages = "830--834",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "5",
}