Upper limits on the branching ratios τ → μγ and τ → eγ

Journal article

The DELPHI collaboration has searched for lepton flavour violating decays τ → μγ and τ → eγ using a data sample of about 70 pb -1 of integrated luminosity corresponding to 81 000 produced τ +τ - events. No candidates were found for either of the two modes. This yields branching ratio upper limits of B(τ → eγ) < 1.1 × 10 -4 and B(τ → μγ) < 6.2 × 10 -5 at 90% confidence level.

Authors: Abreu, P; Adam, W; Adye, T; Agasi, E; Ajinenko, I

• Journal: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
• Volume: 359
• Issue: 3-4
• Pages: 411-421
• Publication date: 1995-01-01
• DOI: 10.1016/0370-2693(95)01045-R
• ISSN: 0370-2693
• Language: English