Search for lepton flavor violating τ decays into three leptons

Authors :: Miyazaki, Y.
Adachi, I.
Aihara, H.
Arinstein, K.
Aulchenko, V.
Aushev, T.
Bakich, A.M.
Balagura, V.
Barberio, E.
Bay, A.
Bitenc, U.
Bondar, A.
Bozek, A.
Bračko, M.
Browder, T.E.
Chen, A.
Chen, K.-F.
Chen, W.T.
Cheon, B.G.
Chistov, R.
Source :: Physics Letters B. Feb2008, Vol. 660 Issue 3, p154-160. 7p.
Publication Year :: 2008
Abstract: Abstract: We search for lepton flavor violating τ decays into three leptons (electron or muon) using 535 fb−1 of data collected with the Belle detector at the KEKB asymmetric-energy collider. No evidence for these decays is observed, and we set 90% confidence level upper limits on the branching fractions of . These results improve upon our previously published upper limits by factors of 4.9 to 10. [Copyright &y& Elsevier]