Search for lepton-flavor-violating τ decays into three leptons with 719 million produced τ+τ− pairs

By K. Hayasaka, K. Inami, Y. Miyazaki, K. Arinstein, V. Aulchenko, T. Aushev, A. Bakich, A. Bay, K. Belous, V. Bhardwaj and 125 more. 2010

447 citations recorded by the source corpus.

We present a search for lepton-flavor-violating τ decays into three leptons (electrons or muons) using 782 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No evidence for these decays is observed and we set 90% confidence level upper limits on the branching fractions between 1.5 × 10- 8 and 2.7 × 10- 8. © 2010 Elsevier B.V.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/95be73ad8675277932c88cbc7f637efcb3c37db8

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In Nuclear and High Energy Physics

1. I. Bischer
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Citations in the corpus

• General neutrino interactions from an effective field theory perspective (2019, result): “If we consider operators with tau flavour indices, however, for instance tau decays like τ → μμμ and τ → eee, constraints are somewhat weaker, but still beyond the typical sensitivity of neutrino experiments: • τ → μμμ: The relevant coefficients are C ll , C μτμμ le , C μμμτ le and constrained to be”
• Patterns of flavour violation in the presence of a fourth generation of quarks and leptons (2010, unknown): “7 · 10−8 [59] τ− → μ−μ+μ− 7.”
• Lepton flavor violation in the scotogenic model (2013, unknown): “7× 10−8 [14] ∼ 10−9 − 10−10 [11] τ → 3μ 2.”
• Physics beyond colliders at CERN: beyond the Standard Model working group report (2019, unknown): “1× 10−8 at the 90% confidence level has been set by the Belle collaboration [130].”
• From the Trees to the Forest: A Review of Radiative Neutrino Mass Models (2017, unknown): “7 × 10−8 [467] ∼ 10−9 [457] τ− → μ+e−e− 1.”
• Charged Lepton Flavour Violation: An Experimental and Theoretical Introduction (2017, unknown): “1× 10−8 90% Belle 2010 [57] τ → πe < 8.”