New search for τ→μγ and τ→eγ decays at Belle

Abstract We report on a search for the lepton flavor violating τ − → μ − γ and τ − → e − γ decays based on 535 fb −1 of data accumulated at the Belle experiment. No signal is found and we set 90% confidence level upper limits on the branching ratios B ( τ − → μ − γ ) 4.5 × 10 −8 and B ( τ − → e − γ ) 1.2 × 10 −7 .