Search for Lepton Flavor Violating tau Decays into Three Leptons
arXiv:0711.2189 · doi:10.1016/j.physletb.2007.12.046
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 of (2.0-4.1)x10^-8. These results improve upon our previously published upper limits by factors of 4.9 to 10.
11 pages, 4 figures, submitted to Phys. Lett. B