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

R Louvot; J Wicht; O Schneider; I Adachi; H Aihara; K Arinstein; V Aulchenko; T Aushev; A M Bakich; V Balagura; A Bay; V Bhardwaj; U Bitenc; A Bondar; A Bozek; M Bracko; T E Browder; A Chen; B G Cheon; R Chistov; I-S Cho; Y Choi; J Dalseno; M Danilov; M Dash; A Drutskoy; W Dungel; S Eidelman; N Gabyshev; P Goldenzweig; B Golob; H Ha; J Haba; K Hayasaka; H Hayashii; M Hazumi; Y Hoshi; W-S Hou; H J Hyun; T Iijima; K Inami; A Ishikawa; H Ishino; R Itoh; M Iwasaki; N J Joshi; D H Kah; J H Kang; N Katayama; H Kawai; T Kawasaki; H Kichimi; S K Kim; Y I Kim; Y J Kim; K Kinoshita; S Korpar; P Krizan; P Krokovny; R Kumar; A Kuzmin; Y-J Kwon; S-H Kyeong; J S Lange; J S Lee; M J Lee; S E Lee; T Lesiak; J Li; A Limosani; S-W Lin; D Liventsev; F Mandl; A Matyja; S McOnie; T Medvedeva; K Miyabayashi; H Miyake; H Miyata; Y Miyazaki; R Mizuk; T Mori; E Nakano; M Nakao; S Nishida; O Nitoh; S Ogawa; T Ohshima; S Okuno; H Ozaki; G Pakhlova; C W Park; H K Park; R Pestotnik; L E Piilonen; H Sahoo; Y Sakai; J Schümann; A J Schwartz; A Sekiya; K Senyo; M E Sevior; M Shapkin; J-G Shiu; J B Singh; A Somov; S Stanic; M Staric; K Sumisawa; T Sumiyoshi; M Tanaka; G N Taylor; Y Teramoto; I Tikhomirov; K Trabelsi; S Uehara; T Uglov; Y Unno; S Uno; Y Usov; G Varner; K Vervink; C C Wang; C H Wang; P Wang; X L Wang; Y Watanabe; R Wedd; E Won; B D Yabsley; Y Yamashita; M Yamauchi; Z P Zhang; V Zhilich; V Zhulanov; T Zivko; A Zupanc; N Zwahlen; O Zyukova; Belle Collaboration

doi:10.1103/PhysRevLett.102.021801

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

Phys Rev Lett. 2009 Jan 16;102(2):021801. doi: 10.1103/PhysRevLett.102.021801. Epub 2009 Jan 13.

Authors

R Louvot¹, J Wicht, O Schneider, I Adachi, H Aihara, K Arinstein, V Aulchenko, T Aushev, A M Bakich, V Balagura, A Bay, V Bhardwaj, U Bitenc, A Bondar, A Bozek, M Bracko, T E Browder, A Chen, B G Cheon, R Chistov, I-S Cho, Y Choi, J Dalseno, M Danilov, M Dash, A Drutskoy, W Dungel, S Eidelman, N Gabyshev, P Goldenzweig, B Golob, H Ha, J Haba, K Hayasaka, H Hayashii, M Hazumi, Y Hoshi, W-S Hou, H J Hyun, T Iijima, K Inami, A Ishikawa, H Ishino, R Itoh, M Iwasaki, N J Joshi, D H Kah, J H Kang, N Katayama, H Kawai, T Kawasaki, H Kichimi, S K Kim, Y I Kim, Y J Kim, K Kinoshita, S Korpar, P Krizan, P Krokovny, R Kumar, A Kuzmin, Y-J Kwon, S-H Kyeong, J S Lange, J S Lee, M J Lee, S E Lee, T Lesiak, J Li, A Limosani, S-W Lin, D Liventsev, F Mandl, A Matyja, S McOnie, T Medvedeva, K Miyabayashi, H Miyake, H Miyata, Y Miyazaki, R Mizuk, T Mori, E Nakano, M Nakao, S Nishida, O Nitoh, S Ogawa, T Ohshima, S Okuno, H Ozaki, G Pakhlova, C W Park, H K Park, R Pestotnik, L E Piilonen, H Sahoo, Y Sakai, J Schümann, A J Schwartz, A Sekiya, K Senyo, M E Sevior, M Shapkin, J-G Shiu, J B Singh, A Somov, S Stanic, M Staric, K Sumisawa, T Sumiyoshi, M Tanaka, G N Taylor, Y Teramoto, I Tikhomirov, K Trabelsi, S Uehara, T Uglov, Y Unno, S Uno, Y Usov, G Varner, K Vervink, C C Wang, C H Wang, P Wang, X L Wang, Y Watanabe, R Wedd, E Won, B D Yabsley, Y Yamashita, M Yamauchi, Z P Zhang, V Zhilich, V Zhulanov, T Zivko, A Zupanc, N Zwahlen, O Zyukova; Belle Collaboration

Affiliation

¹ Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne.

PMID: 19257264
DOI: 10.1103/PhysRevLett.102.021801

Abstract

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).