Search for Lepton Flavor Violating tau Decays into Three Leptons

2007/08/24 by K. Abe, The Belle Collaboration, Abe, K.
Physics and Astronomy · Computer Science · #Particle physics theoretical and experimental studies #Particle Detector Development and Performance #Computational Physics and Python Applications

paper · pdf · doi:10.48550/arxiv.0708.3272

Abstract

We search for lepton-flavor-violating tau decays into three leptons (electron or muon) using 535 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 2.0x10^-8 and 4.1x10^-8. These results improve the best previously published upper limits by factors from 4.9 to 7.0.

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