Publication at Faculty of Mathematics and Physics |
2023
Abstract
We present a search for the lepton-flavor-violating decays B-s(0) -> l(-/+) tau(+/-), where l = e, mu, using the full data sample of 121 fb(-1) collected at the Gamma(5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We use B-s(0)(B) over bar (0)(s) events in which one B-s(0) meson is reconstructed in a semileptonic decay mode and the other in the signal mode.
We find no evidence for B-0(s) -> l(-/+) tau(+/-) decays and set upper limits on their branching fractions at 90% confidence level as B(B-s(0) -> e(-/+)tau(+/-)) mu(-/+)tau(+/-)) e(-/+)tau(+/-) decay rate.
