# Upper limits on the branching ratios $\tau\rightarrow \mu\gamma$ and $\tau\rightarrow$ e$\gamma$

Abstract : The DELPHI collaboration has searched for lepton flavour violating decays \tau \rightarrow \mu \gamma and \tau \rightarrow e \gamma using a data sample of about 70~pb^{-1} of integrated luminosity corresponding to 81 000 produced \tau^+ \tau^- events. No candidates were found for either of the two modes. This yields branching ratio upper limits of \rm{B}( \tau \rightarrow e \gamma ) 1.1 \times 10^{-4} and \rm{B} ( \tau \rightarrow \mu \gamma) 6.2 \times 10^{-5} at 90\% confidence level.
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Journal articles

Cited literature [4 references]

http://hal.in2p3.fr/in2p3-00007639
Contributor : Sylvie Flores <>
Submitted on : Friday, April 23, 1999 - 10:07:25 AM
Last modification on : Wednesday, March 31, 2021 - 10:50:02 PM
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### Identifiers

• HAL Id : in2p3-00007639, version 1

### Citation

P. Abreu, W. Adam, T. Adye, E. Agasi, I. Ajinenko, et al.. Upper limits on the branching ratios $\tau\rightarrow \mu\gamma$ and $\tau\rightarrow$ e$\gamma$. Physics Letters B, Elsevier, 1995, 359, pp.411-421. ⟨in2p3-00007639⟩

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