Search for Lepton Flavor Violation in the Decay τ^{±}→μ^{±}γ

Aubert, B. et al. (2005) Search for Lepton Flavor Violation in the Decay τ^{±}→μ^{±}γ. Physical Review Letters, 95 (4). 041802. ISSN 0031-9007

Abstract

A search for the nonconservation of lepton flavor number in the decay τ±→μ±γ has been performed using 2.07×108 e+e-→τ+τ- events produced at a center-of-mass energy near 10.58 GeV with the BABAR detector at the PEP-II storage ring. We find no evidence for a signal and set an upper limit on the branching ratio of B(τ±→μ±γ)<6.8×10-8 at 90% confidence level.

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