Measurement of inclusive Ds, D0, and J/ψ rates and determination of the Bs(*) (B)over-bars(*) production fraction in b(b)over-bar events at the Υ(5S) resonance

被引：46
作者：
Drutskoy, A. [1 ]
Abe, K.
Abe, K.
Adachi, I.
Aihara, H.
Anipko, D.
Arinstein, K.
Aulchenko, V.
Aushev, T.
Banerjee, S.
Barberio, E.
Barbero, M.
Bedny, I.
Belous, K.
Bitenc, U.
Bizjak, I.
Blyth, S.
Bondar, A.
Bozek, A.
Bracko, M.
Brodzicka, J.
Browder, T. E.
Chang, P.
Chao, Y.
Chen, A.
Chen, K. -F.
Chen, W. T.
Cheon, B. G.
Chistov, R.
Choi, Y.
Choi, Y. K.
Chuvikov, A.
Cole, S.
Dalseno, J.
Danilov, M.
Dash, M.
Dragic, J.
Eidelman, S.
Epifanov, D.
Fratina, S.
Gabyshev, N.
Gershon, T.
Go, A.
Gokhroo, G.
Goldenzweig, P.
Golob, B.
Ha, H.
Haba, J.
Hara, T.
Hayasaka, K.
机构：
[1] Univ Cincinnati, Cincinnati, OH 45221 USA
[2] Budker Inst Nucl Phys, Novosibirsk 630090, Russia
[3] Chiba Univ, Chiba, Japan
[4] Chonnam Natl Univ, Kwangju, South Korea
[5] Univ Frankfurt, D-6000 Frankfurt, Germany
[6] Grad Univ Adv Studies, Hayama, Japan
[7] Univ Hawaii, Honolulu, HI 96822 USA
[8] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki, Japan
[9] Hiroshima Inst Technol, Hiroshima, Japan
[10] Univ Illinois, Urbana, IL 61801 USA
[11] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China
[12] Inst High Energy Phys, Vienna, Austria
[13] Inst High Energy Phys, Protvino, Russia
[14] Inst Theoret & Expt Phys, Moscow 117259, Russia
[15] Jozef Stefan Inst, Ljubljana, Slovenia
[16] Kanagawa Univ, Yokohama, Kanagawa, Japan
[17] Korea Univ, Seoul 136701, South Korea
[18] Kyungpook Natl Univ, Taegu 702701, South Korea
[19] EPFL, Swiss Fed Inst Technol, CH-1015 Lausanne, Switzerland
[20] Univ Ljubljana, Ljubljana, Slovenia
[21] Univ Maribor, SLO-2000 Maribor, Slovenia
[22] Univ Melbourne, Melbourne, Vic, Australia
[23] Nagoya Univ, Nagoya, Aichi, Japan
[24] Nara Womens Univ, Nara 630, Japan
[25] Natl Cent Univ, Chungli 32054, Taiwan
[26] Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan
[27] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
[28] Nippon Dent Univ, Niigata, Japan
[29] Niigata Univ, Niigata, Japan
[30] Univ Nova Gorica, Nova Gorica, Slovenia
[31] Osaka City Univ, Osaka 558, Japan
[32] Osaka Univ, Osaka, Japan
[33] Panjab Univ, Chandigarh 160014, India
[34] Peking Univ, Beijing 100871, Peoples R China
[35] Princeton Univ, Princeton, NJ 08544 USA
[36] RIKEN BNL Res Ctr, Upton, NY 11973 USA
[37] Saga Univ, Saga 840, Japan
[38] Univ Sci & Technol China, Hefei 230026, Peoples R China
[39] Seoul Natl Univ, Seoul, South Korea
[40] Shinshu Univ, Nagano, Japan
[41] Sungkyunkwan Univ, Suwon, South Korea
[42] Univ Sydney, Sydney, NSW 2006, Australia
[43] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[44] Toho Univ, Funabashi, Chiba, Japan
[45] Tohoku Gakuin Univ, Tagajo, Miyagi, Japan
[46] Tohoku Univ, Sendai, Miyagi 980, Japan
[47] Univ Tokyo, Dept Phys, Tokyo 113, Japan
[48] Tokyo Inst Technol, Tokyo 152, Japan
[49] Tokyo Metropolitan Univ, Tokyo 158, Japan
[50] Tokyo Univ Agr & Technol, Tokyo, Japan
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 05期
关键词：
D O I：
10.1103/PhysRevLett.98.052001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The inclusive production of D-s, D-0, and J/psi mesons is studied using a 1.86 fb(-1) data sample collected on the Y(5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The number of bb events in this Y(5S) data sample is determined. We measure the branching fractions B(Y(5S) -> DsX)/2 = (23.6 +/- 1.2 +/- 3.6)%, B(Y(5S) -> (DX)-X-0)/2 = (53.8 +/- 2.0 +/- 3.4)%, and B(Y(5S) -> J/psi X)/2 = (1.030 +/- 0.080 +/- 0.067)%. From the D-s and D-0 inclusive branching fractions the ratio f(s) = (18.0 +/- 1.3 +/- 3.2)% of B-s((*)) B-s((*)) to the total bb quark pair production at the Y(5S) energy is obtained in a model-dependent way.
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页数：6
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