Title

Observation of radiative leptonic decay of the tau lepton

Authors

T. Bergfeld, University of Illinois Urbana-Champaign
B. I. Eisenstein, University of Illinois Urbana-Champaign
J. Ernst, University of Illinois Urbana-Champaign
G. E. Gladding, University of Illinois Urbana-Champaign
G. D. Gollin, University of Illinois Urbana-Champaign
R. M. Hans, University of Illinois Urbana-Champaign
E. Johnson, University of Illinois Urbana-Champaign
I. Karliner, University of Illinois Urbana-Champaign
M. A. Marsh, University of Illinois Urbana-Champaign
M. Palmer, University of Illinois Urbana-Champaign
C. Plager, University of Illinois Urbana-Champaign
C. Sedlack, University of Illinois Urbana-Champaign
M. Selen, University of Illinois Urbana-Champaign
J. J. Thaler, University of Illinois Urbana-Champaign
J. Williams, University of Illinois Urbana-Champaign
K. W. Edwards, Carleton University
R. Janicek, Carleton University
P. M. Patel, Institute of Particle Physics
A. J. Sadoff, Ithaca College
R. Ammar, University of Kansas, Lawrence
P. Baringer, University of Kansas, Lawrence
A. Bean, University of Kansas, Lawrence
D. Besson, University of Kansas, Lawrence
R. Davis, University of Kansas, Lawrence
S. Kotov, University of Kansas, Lawrence
I. Kravchenko, University of Kansas, Lawrence
N. Kwak, University of Kansas, Lawrence
X. Zhao, University of Kansas, Lawrence
S. Anderson, University of Minnesota Twin Cities
V. V. Frolov, University of Minnesota Twin Cities
Y. Kubota, University of Minnesota Twin Cities
S. J. Lee, University of Minnesota Twin Cities
R. Mahapatra, University of Minnesota Twin Cities

Document Type

Article

Publication Date

1-1-2000

Abstract

Using 4.68 fb of e e annihilation data collected with the CLEO II detector at the Cornell Electron Storage Ring, we have studied τ radiative decays τ →ν μ ν μγ and τ-→ν e ν γ. 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 or (1.75±0.06±0.17)×10 , respectively. The branching fractions are in agreement with standard model theoretical predictions. © 2000 The American Physical Society. −1 + − − − ¯ − ¯ −3 −2 τ τ e

Publication Name

Physical Review Letters

Volume Number

84

First Page

830

Last Page

834

Issue Number

5

DOI

10.1103/PhysRevLett.84.830

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