Search for neutrinoless tau decays τ → 3ℓ and τ → ℓK S 0

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

Research output: Contribution to journalArticle

5 Citations (Scopus)


Neutrinoless tau-lepton decays into either three leptons (τ - → ℓ 1 -23 ) or one lepton and one K S 0 meson(τ - → ℓ - K S 0 ) 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 Jan 1

ASJC Scopus subject areas

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

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