Speaker
Hulya Atmacan
(University of Cincinnati Main Campus)
Description
We present a search for the lepton-flavor-violating decays $B^0→\tau^\pm\ell^\mp$, where $\ell= (e,\,\mu)$, using the full data sample of $772×10^6$ $B\overline B$ pairs recorded by the Belle detector at the KEKB asymmetric-energy $e^+e^−$ collider. We use events in which one $B$ meson is fully reconstructed in a hadronic decay mode. The $\tau^\pm$ lepton is reconstructed indirectly using the momentum of the reconstructed $B$ and that of the $\ell^\mp$ from the signal decay. We find no evidence for $B^0→\tau^\pm \ell^\mp$ decays and set upper limits on their branching fractions at 90% confidence level of $\cal B$($B^0→\tau^\pm\mu^\mp$)$< 1.5 \times 10^{-5}$ and $\cal B$($B^0→\tau^\pm e^\mp$)$< 1.6 \times 10^{-5}$.
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Authors
Alan Schwartz
(University of Cincinnati)
Hulya Atmacan
(University of Cincinnati Main Campus)
Kay Kinoshita
(University of Cincinnati)
