Yusa, Y.Nagamine, T.Yamaguchi, A.Abe, K.Abe, K.Abe, T.Adachi, I.Aihara, H.Akatsu, M.Asano, Y.Aulchenko, V.Aushev, T.Bahinipati, S.Bakich, A.M.Banas, E.Bedny, I.Bitenc, U.Bizjak, I.Bondar, A.Bozek, A.Bračko, M.Browder, T.E.Chang, M.-C.Cheon, B.G.Chistov, R.Choi, Y.Chuvikov, A.Danilov, M.Dong, L.Y.Eidelman, S.Eiges, V.Enari, Y.Fratina, S.Gabyshev, N.Garmash, A.Gershon, T.Gokhroo, G.Golob, B.Haba, J.Hayashii, H.Hazumi, M.Hinz, L.Hokuue, T.Hoshi, Y.Hou, W.-S.Iijima, T.Inami, K.Ishikawa, A.Itoh, R.Iwasaki, H.Iwasaki, M.Kang, J.H.Kang, J.S.Kapusta, P.Katayama, N.Kawai, H.Kawasaki, T.Kichimi, H.Kim, H.O.Koppenburg, P.Korpar, S.Križan, P.Krokovny, P.Kuzmin, A.Kwon, Y.-J.Lee, S.H.Lesiak, T.Li, J.Lin, S.-W.MacNaughton, J.Matsumoto, T.Matyja, A.Mikami, Y.Mitaroff, W.Miyata, H.Mohapatra, D.Moloney, G.R.Mori, T.Nagasaka, Y.Nakano, E.Nakao, M.Nakazawa, H.Natkaniec, Z.Nishida, S.Nitoh, O.Nozaki, T.Ogawa, S.Ohshima, T.Okabe, T.Okuno, S.Olsen, S.L.Ostrowicz, W.Ozaki, H.Pakhlov, P.Palka, H.Park, H.Park, K.S.Parslow, N.Perroud, J.-P.2010-11-052010-11-052010-11-05200410.1016/j.physletb.2004.04.0022-s2.0-2442447414https://infoscience.epfl.ch/handle/20.500.14299/56870We have searched for neutrinoless τ lepton decays into three charged leptons using an 87.1fb-1 data sample collected with the Belle detector at the KEKB e+e- collider. Since the number of signal candidate events is compatible with that expected from the background, we set 90% confidence level upper limits on the branching fractions in the range (1.9-3.5)×10-7 for various decay modes τ -→ℓ-ℓ+ℓ- where ℓ represents e or μ. © 2004 Published by Elsevier B.V.text::journal::journal article::research article