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arxiv: 1206.5595 · v2 · submitted 2012-06-25 · ✦ hep-ex

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Search for Lepton-Flavor-Violating and Lepton-Number-Violating tau to lhh' Decay Modes

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classification ✦ hep-ex
keywords lepton-flavor-violatinglepton-number-violatinglimitssearchupperasymmetric-energyaveragebelle
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We search for lepton-flavor-violating and lepton-number-violating tau decays into a lepton (l = electron or muon) and two charged mesons (h, h' = pion or Kaon) using 854 fb^{-1} of data collected with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. We obtain 90% confidence level upper limits on the tau to lhh' branching fractions in the range (2.0-8.4)*10^{-8}. These results improve upon our previously published upper limits by factors of about 1.8 on average.

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