Search for B0 ??�? (?=e, ?) with a hadronic tagging method at Belle SEARCH for B0 ??�? (?=e, ?) with A ... H. ATMACAN et al.

Abstract

We present a search for the lepton-flavor-violating decays B0??�?, where ?=(e,?), using the full data sample of 772�106 BB� 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 ?� lepton is reconstructed indirectly using the momentum of the reconstructed B and that of the ? from the signal decay. We find no evidence for B0??�? decays and set upper limits on their branching fractions at 90% confidence level of B(B0??�??)<1.5�10-5 and B(B0??�e?)<1.6�10-5. � 2021 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.