Elsevier

Physics Letters B

Volume 589, Issues 3–4, 10 June 2004, Pages 103-110
Physics Letters B

Search for neutrinoless decays τ→3ℓ

https://doi.org/10.1016/j.physletb.2004.04.002Get rights and content
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Abstract

We have searched for neutrinoless τ lepton decays into three charged leptons using an 87.1fb−1 data sample collected with the Belle detector at the KEKB e+e collider. Since the number of signal candidate events is compatible with that expected from the background, we set 90% confidence level upper limits on the branching fractions in the range (1.9–3.5)×10−7 for various decay modes τ→ℓ+ where ℓ represents e or μ.

PACS

13.35.Dx
14.60.Fg
11.30.Hv

Keywords

TAU lepton flavor violation

Cited by (0)

1

On leave from Nova Gorica Polytechnic, Nova Gorica, Slovenia.