Search for lepton flavor violating decays with a meson

Authors :: Miyazaki, Y.
Abe, K.
Aihara, H.
Anipko, D.
Arinstein, K.
Aulchenko, V.
Aushev, T.
Bakich, A.M.
Barbero, M.
Bedny, I.
Belous, K.
Bitenc, U.
Bizjak, I.
Blyth, S.
Bondar, A.
Bozek, A.
Bračko, M.
Browder, T.E.
Chen, A.
Chen, W.T.
Source :: Physics Letters B. Aug2006, Vol. 639 Issue 3/4, p159-164. 6p.
Publication Year :: 2006
Abstract: Abstract: We have searched for the lepton flavor violating decays ( or μ), using a data sample of 281 fb−1 collected with the Belle detector at the KEKB asymmetric-energy collider. No evidence for a signal was found in either of the decay modes, and we set the following upper limits for the branching fractions: and at the 90% confidence level. These results improve the previously published limits set by the CLEO Collaboration by factors of 16 and 19, respectively. [Copyright &y& Elsevier]