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.

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(+).

引用

页数：6

共 22 条

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