ar X iv : h ep - e x / 02 11 01 7 v 1 7 N ov 2 00 2 1 Search for neutrinoless tau decays
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چکیده
Neutrinoless tau-lepton decays into either three leptons (τ − → ℓ − 1 ℓ2ℓ3) or one lepton and one K 0 S meson(τ − → ℓ − K 0 S) 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.
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متن کامل
ar X iv : h ep - p h / 01 11 02 7 v 1 2 N ov 2 00 1 Models with Extra Dimensions and Their Phenomenology
The Arkani-Hamed-Dimopoulos-Dvali and the Randall-Sundrum models with extra spacelike dimensions, recently proposed as a solution to the hierarchy problem, are reviewed. We discuss their basic properties and phenomenological effects of particle interactions at high energies, predicted whithin these models.
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تاریخ انتشار 2002