Search for Lepton Flavor Violating tau Decays into Three Leptons
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.
12 pages, 12 figures, contributed to EPS 2007 and Lepton Photon 2007