Elsevier

Physics Letters B

Volume 271, Issues 3–4, 21 November 1991, Pages 453-460
Physics Letters B

Search for lepton flavour violation in Z0 decays

https://doi.org/10.1016/0370-2693(91)90117-9Get rights and content

Abstract

We have searched for lepton flavour violation in Z0 boson decays into lepton pairs, Z0→μτ, Z0→eτ, and Z0→eμ. The data sample is based on an integrated luminosity of 10.4 pb-1 corresponding to 370 000 Z0's produced. We obtain upper limits on the branching ratios of 4.8×10-5 for the μτ, 3.4×10-5 for the eτ and 2.4×10-5 for the eμ decay modes at the 95% confidence level.

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    Supported by the German Bundesministerium für Forschung und Technologie.

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