Search for B0 -> Tau +/- l -/+ (l = e, mu) with a hadronic tagging method at Belle

Abstract

We present a search for the lepton-flavor-violating decays B0 -> τ, where l 1/4 e using the full data sample of 772 x 106 BB- pairs recorded by the Belle detector at the KEKB asymmetric-energy eþe-collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode.

The τlepton is reconstructed indirectly using the momentum of the reconstructed B. We find no evidence for B0 -> τ decays and set upper limits on their branching fractions at 90% confidence level of BB0 -> τμ τe < 1.6 x 10-5.

Keywords

• Search
• for
• Tau
• +/-
• -/+
• with
• hadronic
• tagging
• method
• Belle