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

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

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 branchi...

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Veröffentlicht in:Physical review letters 2009-01, Vol.102 (2), p.021801-021801
Hauptverfasser: Louvot, R, Wicht, J, Schneider, O, Adachi, I, Aihara, H, Arinstein, K, Aulchenko, V, Aushev, T, Bakich, A M, Balagura, V, Bay, A, Bhardwaj, V, Bitenc, U, Bondar, A, Bozek, A, Bracko, M, Browder, T E, Chen, A, Cheon, B G, Chistov, R, Cho, I-S, Choi, Y, Dalseno, J, Danilov, M, Dash, M, Drutskoy, A, Dungel, W, Eidelman, S, Gabyshev, N, Goldenzweig, P, Golob, B, Ha, H, Haba, J, Hayasaka, K, Hayashii, H, Hazumi, M, Hoshi, Y, Hou, W-S, Hyun, H J, Iijima, T, Inami, K, Ishikawa, A, Ishino, H, Itoh, R, Iwasaki, M, Joshi, N J, Kah, D H, Kang, J H, Katayama, N, Kawai, H, Kawasaki, T, Kichimi, H, Kim, S K, Kim, Y I, Kim, Y J, Kinoshita, K, Korpar, S, Krizan, P, Krokovny, P, Kumar, R, Kuzmin, A, Kwon, Y-J, Kyeong, S-H, Lange, J S, Lee, J S, Lee, M J, Lee, S E, Lesiak, T, Li, J, Limosani, A, Lin, S-W, Liventsev, D, Mandl, F, Matyja, A, McOnie, S, Medvedeva, T, Miyabayashi, K, Miyake, H, Miyata, H, Miyazaki, Y, Mizuk, R, Mori, T, Nakano, E, Nakao, M, 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, Sahoo, H, Sakai, Y, Schümann, J, Schwartz, A J, Sekiya, A
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Zusammenfassung: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);((*))B[over ]_(s);((*)))/N_(bb[over ])) and the fractions of B_(s);(0) event types at the Upsilon(5S) energy, in particular N_(B_(s);(*)B[over ]_(s);(*))/N_(B_(s);((*))B[over ]_(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).
ISSN:0031-9007