Search for Lepton Flavor Violating tau Decays into Three Leptons

We search for lepton flavor violating τ 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)×10−8 . These results improve upon our previously published upper limits by factors of 4.9 to 10.

Note:

11 pages, 4 figures, submitted to Phys. Lett. B

11.30.Fs
14.60.Fg
13.35.Dx
electron positron: colliding beams
electron positron: annihilation
tau: pair production
tau-: leptonic decay
flavor: violation
final state: (3lepton)
tau-: branching ratio

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