New Search for τ → μ γ and τ → eγ Decays at Belle Belle Collaboration

semanticscholar(2021)

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摘要
We report on a search for the lepton flavor violating τ → μγ and τ → eγ 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 → μγ) < 4.5× 10−8 and B(τ → eγ) < 1.2 × 10−7.
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