First observation of the decay τ−→ϕK−ντ

We present the first observation of τ lepton decays to hadronic final states with a ϕ-meson. This analysis is based on 401 fb−1 of data accumulated at the Belle experiment. The branching fraction obtained is B(τ−→ϕK−ντ)=(4.05±0.25±0.26)×10−5.

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Veröffentlicht in:	Physics letters. B 2006-11, Vol.643 (1), p.5-10
Hauptverfasser:	Inami, K., Abe, K., Aihara, H., Anipko, D., Aulchenko, V., Aushev, T., Bedny, I., Bizjak, I., Bondar, A., Bračko, M., Chen, A., Chen, K.-F., Choi, Y.K., Danilov, M., Drutskoy, A., Eidelman, S., Epifanov, D., Fratina, S., Gabyshev, N., Gershon, T., Gokhroo, G., Ha, H., Haba, J., Hara, K., Hayashii, H., Hazumi, M., Hokuue, T., Hoshi, Y., Hou, S., Hou, W.-S., Hsiung, Y.B., Iijima, T., Ishikawa, A., Itoh, R., Iwasaki, Y., Kang, J.H., Kapusta, P., Kataoka, S.U., Kawai, H., Kim, Y.J., Korpar, S., Križan, P., Kulasiri, R., Kumar, R., Kuzmin, A., Kwon, Y.-J., Leder, G., Liventsev, D., Majumder, G., Mandl, F., Matsumoto, T., Matyja, A., Mitaroff, W., Miyake, H., Mizuk, R., Mueller, J., Nagasaka, Y., Nakano, E., Nitoh, O., Ohshima, T., Okuno, S., Onuki, Y., Ozaki, H., Palka, H., Park, C.W., Park, H., Peak, L.S., Piilonen, L.E, Poluektov, A., Sakai, Y., Schwartz, A.J., Seidl, R., Sevior, M.E., Shwartz, B., Sidorov, V., Singh, J.B., Somov, A., Stanič, S., Starič, M., Stoeck, H., Suzuki, S.Y., Tajima, O., Tamura, N., Tanaka, M., Taylor, G.N., Teramoto, Y., Tian, X.C., Tsukamoto, T., Uehara, S., Uglov, T., Uno, S., Urquijo, P., Usov, Y., Villa, S., Won, E., Yabsley, B.D., Yamaguchi, A., Yamashita, Y., Zhilich, V.
Format:	Artikel
Sprache:	eng
Schlagworte:	Exact sciences and technology Nuclear physics Phi Physics Tau The physics of elementary particles and fields
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Beschreibung
Zusammenfassung:	We present the first observation of τ lepton decays to hadronic final states with a ϕ-meson. This analysis is based on 401 fb−1 of data accumulated at the Belle experiment. The branching fraction obtained is B(τ−→ϕK−ντ)=(4.05±0.25±0.26)×10−5.
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2006.10.027