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  • Measurement of the Decay B_...
    Measurement of the Decay B_(s);(0)-->D_(s);(-)pi;(+) and Evidence for B_(s);(0)-->D_(s);(-/+)K;(+/-) in e;(+)e;(-) Annihilation at sqrt[s] approximately 10.87 GeV
    Louvot, R; Schneider, O; Aihara, H; Arinstein, K; Aulchenko, V; Aushev, T; Bakich, A M; Balagura, V; Bay, A; Bhardwaj, V; Bitenc, U; Bondar, A; Bracko, M; Chen, A; Chistov, R; Cho, I-S; Choi, Y; Danilov, M; Dash, M; Drutskoy, A; Dungel, W; Gabyshev, N; Goldenzweig, P; Ha, H; Hou, W-S; Hyun, H J; Iijima, T; Ishikawa, A; Ishino, H; Itoh, R; Kang, J H; Katayama, N; Kawai, H; Kichimi, H; Kim, Y J; Korpar, S; Krokovny, P; Kumar, R; Kuzmin, A; Kwon, Y-J; Lange, J S; Lee, J S; Li, J; Limosani, A; Lin, S-W; Mandl, F; McOnie, S; Medvedeva, T; Miyabayashi, K; Miyake, H; Miyata, H; Mizuk, R; Mori, T; Nakano, E; Nishida, S; Nitoh, O; Ogawa, S; Ohshima, T; Okuno, S; Ozaki, H; Pakhlova, G; Park, C W; Park, H K; Pestotnik, R; Piilonen, L E; Schümann, J; Schwartz, A J; Sekiya, A; Senyo, K; Sevior, M E; Shapkin, M; Shiu, J-G; Singh, J B; Somov, A; Stanic, S; Staric, M; Sumisawa, K; Sumiyoshi, T; Taylor, G N; Tikhomirov, I; Trabelsi, K; Uehara, S; Unno, Y; Uno, S; Usov, Y; Varner, G; Wang, C C; Wang, C H; Wang, P; Wang, X L; Watanabe, Y; Wedd, R; Won, E; Yabsley, B D; Yamashita, Y; Yamauchi, M; Zhilich, V; Zhulanov, V; Zivko, T; Zwahlen, N

    Physical review letters, 2009-Jan-16, 20090116, Volume: 102, Issue: 2
    Journal Article

    We have studied B_(s);(0)-->D_(s);(-)pi;(+) and B_(s);(0)-->D_(s);(-/+)K;(+/-) decays using 23.6 fb;(-1) of data collected at the Upsilon(5S) resonance with the Belle detector at the KEKB e;(+)e;(-) collider. This highly pure B_(s);(0)-->D_(s);(-)pi;(+) sample is used to measure the branching fraction, B(B_(s);(0)-->D_(s);(-)pi;(+))=3.67_(-0.33);(+0.35)(stat)-0.42+0.43(syst)+/-0.49(f_(s))x10;(-3) (f_(s)=N_(B_(s);((*))Bover _(s);((*)))/N_(bbover )) and the fractions of B_(s);(0) event types at the Upsilon(5S) energy, in particular N_(B_(s);(*)Bover _(s);(*))/N_(B_(s);((*))Bover _(s);((*)))=(90.1_(-4.0);(+3.8)+/-0.2)%. We also determine the masses M(B_(s);(0))=(5364.4+/-1.3+/-0.7) MeV/c;(2) and M(B_(s);(*))=(5416.4+/-0.4+/-0.5) MeV/c;(2). In addition, we observe B_(s);(0)-->D_(s);(-/+)K;(+/-) decays with a significance of 3.5sigma and measure B(B_(s);(0)-->D_(s);(-/+)K;(+/-))=2.4_(-1.0);(+1.2)(stat)+/-0.3(syst)+/-0.3(f_(s))x10;(-4).

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