PS02 Rare Decays
Rare decays of tau-lepton
Department of Physics, Nagoya University, Chikusa, Nagoya, 464-8602, Japan
Accepted: 12 November 2003
Published online: 1 December 2003
We have searched for the Lepton Flavor Violating decays τ –→μ – γ and τ –→μ – η using ~85 fb–1 of data accumulated by the Belle detector at KEKB, and attained preliminary upper limits for the branching fraction Br(τ –→μ – γ) < 3.2× 10–7 and Br(τ –→μ – η) < 3.4 × 10–7, respectively, at the 90% confidence level. These are the first data that reach to the sensitivity of 10–7 level, and provide some constraints on the parameter spaces of vs. SUSY mass and vs. Higgs mass.
PACS: number(s) 13.35.Dx, 11.30.Fs, 14.60.Fg
© Società Italiana di Fisica, Springer-Verlag, 2004