Search for lepton flavor violating τ- decays with a KS 0 meson

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.; Chistov, R.; Choi, Y.; Choi, Y.K.; Chuvikov, A.; Cole, S.; Dalseno, J.; Danilov, M.; Dash, M.; Dragic, J.; Eidelman, S.; Epifanov, D.; Gabyshev, N.; Gershon, T.; Gorišek, A.; Ha, H.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Heffernan, D.; Hokuue, T.; Hoshi, Y.; Hou, S.; Iijima, T.; Imoto, A.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Kang, J.H.; Kapusta, P.; Kawai, H.; Khan, H.R.; Kichimi, H.; Kim, H.O.; Korpar, S.; Krokovny, P.; Kumar, R.; Kuo, C.C.; Kuzmin, A.; Kwon, Y.-J.; Lee, J.; Lesiak, T.; Lin, S.-W.; Mandl, F.; Matsumoto, T.; McOnie, S.; Mitaroff, W.; Miyake, H.; Miyata, H.; Nakano, E.; Nakao, M.; Nishida, S.; Nitoh, O.; Noguchi, S.; Ogawa, S.; Ohshima, T.; Okabe, T.; Okuno, S.; Onuki, Y.; Ozaki, H.; Palka, H.; Park, H.; Peak, L.S.; Pestotnik, R.; Piilonen, L.E.; Poluektov, A.; Sakai, Y.; Schietinger, T.; Schneider, O.; Seidl, R.; Senyo, K.; Sevior, M.E.; Shapkin, M.; Shibuya, H.; Shwartz, B.; Sidorov, V.; Singh, J.B.; Somov, A.; et al.

doi:10.1016/j.physletb.2006.05.086

research article

Search for lepton flavor violating τ- decays with a KS 0 meson

Miyazaki, Y.

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Abe, K.

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Abe, K.

2006

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

We have searched for the lepton flavor violating decays τ- → ℓ- KS 0 (ℓ = e or μ), using a data sample of 281 fb-1 collected with the Belle detector at the KEKB e+ e- 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: B (τ- → e- KS 0) < 5.6 × 10-8 and B (τ- → μ- KS 0) < 4.9 × 10-8 at the 90% confidence level. These results improve the previously published limits set by the CLEO Collaboration by factors of 16 and 19, respectively. © 2006 Elsevier B.V. All rights reserved.