Search for neutrinoless decays τ→3ℓ

Y Yusa; T Nagamine; A Yamaguchi; K Abe; K Abe; T Abe; I Adachi; H Aihara; M Akatsu; Y Asano; V Aulchenko; T Aushev; S Bahinipati; AM Bakich; E Banas; I Bedny; U Bitenc; I Bizjak; A Bondar; A Bozek; M Bračko; TE Browder; MC Chang; BG Cheon; R Chistov; Y Choi; A Chuvikov; M Danilov; LY Dong; S Eidelman; V Eiges; Y Enari; S Fratina; N Gabyshev; A Garmash; T Gershon; G Gokhroo; B Golob; J Haba; H Hayashii; M Hazumi; L Hinz; T Hokuue; Y Hoshi; WS Hou; T Iijima; K Inami; A Ishikawa; R Itoh; H Iwasaki; M Iwasaki; JH Kang; JS Kang; P Kapusta; N Katayama; H Kawai; T Kawasaki; H Kichimi; HO Kim; P Koppenburg; S Korpar; P Križan; P Krokovny; A Kuzmin; YJ Kwon; SH Lee; T Lesiak; J Li; SW Lin; J MacNaughton; T Matsumoto; A Matyja; Y Mikami; W Mitaroff; H Miyata; D Mohapatra; GR Moloney; T Mori; Y Nagasaka; E Nakano; M Nakao; H Nakazawa; Z Natkaniec; S Nishida; O Nitoh; T Nozaki; S Ogawa; T Ohshima; T Okabe; S Okuno; SL Olsen; W Ostrowicz; H Ozaki; P Pakhlov; H Palka; H Park; KS Park; N Parslow; JP Perroud; LE Piilonen

Journal article

Search for neutrinoless decays τ→3ℓ

Y Yusa, T Nagamine, A Yamaguchi, K Abe, K Abe, T Abe, I Adachi, H Aihara, M Akatsu, Y Asano, V Aulchenko, T Aushev, S Bahinipati, AM Bakich, E Banas, I Bedny, U Bitenc, I Bizjak, A Bondar, A Bozek Show all

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | Published : 2004

DOI: 10.1016/j.physletb.2004.04.002

Open access

Abstract

We 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.