Search for neutrinoless tau decays τ → 3ℓ and τ → ℓKS0

Y. Yusa, H. Hayashii, T. Nagamine, A. Yamaguchi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Neutrinoless tau-lepton decays into either three leptons (τ- → ℓ1-23) or one lepton and one KS0 meson(τ- → ℓ- KS0) where lepton ℓ means either an electron or muon, have been searched for using 48.6 fb-1 of data collected with the Belle detector at the KEKB e+e- collider. No evidence for candidate decays are found in any channel. Therefore we set 90% confidence level upper limits on the branching fraction for 8 different decay modes. These limits are more stringent than those set previously and reach to the 10-7 level.

Original languageEnglish
Pages (from-to)95-101
Number of pages7
JournalNuclear Physics B - Proceedings Supplements
Publication statusPublished - 2003 Jul

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics


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