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  • Study of τ−→KSπ−ντ decay at...
    Epifanov, D.; Aihara, H.; Aulchenko, V.; Bakich, A.M.; Balagura, V.; Bedny, I.; Belous, K.; Bizjak, I.; Bondar, A.; Bozek, A.; Chen, K.-F.; Chen, W.T.; Chiang, C.-C.; Chistov, R.; Cho, I.-S.; Choi, Y.; Dalseno, J.; Dash, M.; Drutskoy, A.; Eidelman, S.; Gokhroo, G.; Golob, B.; Haba, J.; Hayashii, H.; Hazumi, M.; Hokuue, T.; Hoshi, Y.; Hou, W.-S.; Hyun, H.J.; Iijima, T.; Ikado, K.; Inami, K.; Ishikawa, A.; Itoh, R.; Kaji, H.; Kawai, H.; Kawasaki, T.; Kim, H.O.; Kim, S.K.; Križan, P.; Krokovny, P.; Kumar, R.; Kuo, C.C.; Kuzmin, A.; Kwon, Y.-J.; Lee, J.S.; Lee, M.J.; Lee, S.E.; Lesiak, T.; Lin, S.-W.; Liu, Y.; Marlow, D.; Matsumoto, T.; Matyja, A.; Medvedeva, T.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Nakano, E.; Nakao, M.; Natkaniec, Z.; Nishida, S.; Ohshima, T.; Ostrowicz, W.; Pakhlov, P.; Park, K.S.; Peak, L.S.; Poluektov, A.; Sahoo, H.; Seidl, R.; Senyo, K.; Sevior, M.E.; Shapkin, M.; Shibuya, H.; Sokolov, A.; Stanič, S.; Sumiyoshi, T.; Takasaki, F.; Tanaka, M.; Taylor, G.N.; Teramoto, Y.; Tian, X.C.; Tikhomirov, I.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Vervink, K.; Vinokurova, A.; Wang, C.H.; Wang, P.; Wedd, R.; Yabsley, B.D.; Yamaguchi, A.; Yuan, C.Z.; Zhang, Z.P.; Zhilich, V.; Zupanc, A.

    Physics letters. B, 10/2007, Letnik: 654, Številka: 3-4
    Journal Article

    We present a study of the decay τ−→KSπ−ντ using a 351 fb−1 data sample collected with the Belle detector. The analysis is based on 53,110 lepton-tagged signal events. The measured branching fraction B(τ−→KSπ−ντ)=(0.404±0.002(stat.)±0.013(syst.))% is consistent with the world average value and has better accuracy. An analysis of the KSπ− invariant mass spectrum reveals contributions from the K∗(892)− as well as other states. For the first time the K∗(892)− mass and width have been measured in τ decay: M(K∗(892)−)=(895.47±0.20(stat.)±0.44(syst.)±0.59(mod.)) MeV/c2, Γ(K∗(892)−)=(46.2±0.6(stat.)±1.0(syst.)±0.7(mod.)) MeV. The K∗(892)− mass is significantly different from the current world average value.