Improved measurements of branching fractions and CP partial rate asymmetries for B→ωK and B→ωπ

被引：11
作者：
Jen, C. -M. [1 ]
Chang, P.
Abe, K.
Abe, K.
Adachi, I.
Aihara, H.
Anipko, D.
Arinstein, K.
Aulchenko, V.
Bakich, A. M.
Barberio, E.
Barbero, M.
Bay, A.
Bedny, I.
Belous, K.
Bitenc, U.
Bizjak, I.
Bondar, A.
Bozek, A.
Bracko, M.
Browder, T. E.
Chen, A.
Chen, W. T.
Cheon, B. G.
Choi, S. -K.
Choi, Y.
Choi, Y. K.
Chuvikov, A.
Cole, S.
Dalseno, J.
Dash, M.
Drutskoy, A.
Eidelman, S.
Epifanov, D.
Fratina, S.
Gabyshev, N.
Gershon, T.
Go, A.
Gokhroo, G.
Golob, B.
Ha, H.
Haba, J.
Hara, T.
Hayasaka, K.
Hayashii, H.
Hazumi, M.
Heffernan, D.
Hoshi, Y.
Hou, S.
Hou, W. -S.
机构：
[1] Budker Inst Nucl Phys, Novosibirsk 630090, Russia
[2] Chiba Univ, Chiba 260, Japan
[3] Chonnam Natl Univ, Kwangju 500757, South Korea
[4] Univ Cincinnati, Cincinnati, OH 45221 USA
[5] Grad Univ Adv Studies, Hayama, Japan
[6] Gyeongsang Natl Univ, Chinju, South Korea
[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] Inst High Energy Phys, Vienna, Austria
[12] Inst High Energy Phys, Protvino, Russia
[13] Inst Theoret & Expt Phys, Moscow, Russia
[14] Jozef Stefan Inst, Ljubljana 61000, Slovenia
[15] Kanagawa Univ, Yokohama, Kanagawa, Japan
[16] Korea Univ, Seoul 136701, South Korea
[17] Kyungpook Natl Univ, Taegu 702701, South Korea
[18] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, CH-1015 Lausanne, Switzerland
[19] Univ Ljubljana, Ljubljana 61000, Slovenia
[20] Univ Maribor, SLO-2000 Maribor, Slovenia
[21] Univ Melbourne, Parkville, Vic 3052, Australia
[22] Nagoya Univ, Nagoya, Aichi 464, Japan
[23] Nara Womens Univ, Nara 630, Japan
[24] Natl Cent Univ, Chungli 32054, Taiwan
[25] Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan
[26] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
[27] Nippon Dent Univ, Niigata, Japan
[28] Niigata Univ, Niigata 95021, Japan
[29] Osaka City Univ, Osaka 558, Japan
[30] Osaka Univ, Suita, Osaka 565, Japan
[31] Panjab Univ, Chandigarh 160014, India
[32] Peking Univ, Beijing 100871, Peoples R China
[33] Princeton Univ, Princeton, NJ 08544 USA
[34] Brookhaven Natl Lab, Res Ctr, RIKEN, Upton, NY 11973 USA
[35] Univ Sci & Technol China, Hefei 230026, Peoples R China
[36] Sungkyunkwan Univ, Suwon 440746, South Korea
[37] Univ Sydney, Sydney, NSW 2006, Australia
[38] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[39] Toho Univ, Funabashi, Chiba 274, Japan
[40] Tohoku Gakuin Univ, Tagajo, Miyagi 985, Japan
[41] Tohoku Univ, Sendai, Miyagi 980, Japan
[42] Univ Tokyo, Dept Phys, Tokyo 106, Japan
[43] Tokyo Inst Technol, Tokyo 152, Japan
[44] Tokyo Metropolitan Univ, Tokyo 158, Japan
[45] Tokyo Univ Agr & Technol, Tokyo, Japan
[46] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA
[47] Yonsei Univ, Seoul 120749, South Korea
来源：
PHYSICAL REVIEW D | 2006年 / 74卷 / 11期
关键词：
D O I：
10.1103/PhysRevD.74.111101
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report improved measurements of B to pseudoscalar-vector decays containing an omega meson in the final state. Our results are obtained from a data sample that contains 388x10(6) B (B) over bar pairs accumulated at the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure the following branching fractions: B(B+->omega K+)=[8.1 +/- 0.6(stat.)+/- 0.6(syst.)]x10(-6), B(B+->omega pi(+))=[6.9 +/- 0.6(stat.)+/- 0.5(syst.)]x10(-6), and B(B-0 ->omega K-0)=[4.4(-0.7)(+0.8)(stat.)+/- 0.4(syst.)]x 10(-6). The partial width ratio (Gamma(B+->omega K+))/(Gamma(B0 ->omega K0))=1.7 +/- 0.3(stat.)+/- 0.1(sys.). We also set the 90% confidence level upper limit B(B-0 ->omega pi(0))< 2.0x10(-6). In addition, we obtain the partial rate asymmetries A(CP)=0.05(-0.07)(+0.08)(stat.)+/- 0.01(syst.) for B+->omega K+, and A(CP)=-0.02 +/- 0.09(stat.)+/- 0.01(syst.) for B+->omega pi(+).
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页数：6
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