Kavli Affiliate: T. Higuchi
| First 5 Authors: Belle, Belle II Collaborations, :, I. Adachi, Y. Ahn
| Summary:
We present the results of a search for the charged-lepton-flavor violating
decays $B^0 rightarrow K^{*0}tau^pm ell^{mp}$, where $ell^{mp}$ is
either an electron or a muon. The results are based on 365 fb$^{-1}$ and 711
fb$^{-1}$ datasets collected with the Belle II and Belle detectors,
respectively. We use an exclusive hadronic $B$-tagging technique, and search
for a signal decay in the system recoiling against a fully reconstructed $B$
meson. We find no evidence for $B^0 rightarrow K^{*0}tau^pm ell^{mp}$
decays and set upper limits on the branching fractions in the range of
$(2.9-6.4)times10^{-5}$ at 90% confidence level.
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