Observation of B decays to two kaons
文献类型：期刊论文
| 作者 | Lin, SW; Chang, P; Abe, K; Abe, K; Adachi, I; Aihara, H; Anipko, D; Arinstein, K; Aulchenko, V; Aushev, T |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2007 |
| 卷号 | 98期号:18页码:181804 |
| 通讯作者 | Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan ; Budker Inst Nucl Phys, Novosibirsk 630090, Russia ; Chiba Univ, Chiba, Japan ; Hanyang Univ, Seoul 133791, South Korea ; Univ Cincinnati, Cincinnati, OH 45221 USA ; Univ Giessen, Giessen, Germany ; Grad Univ Adv Studies, Hayama, Japan ; Univ Hawaii, Honolulu, HI 96822 USA ; High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki, Japan ; Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China ; Inst High Energy Phys, Vienna, Austria ; Inst High Energy Phys, Protvino, Russia ; Inst Theoret & Expt Phys, Moscow 117259, Russia ; Jozef Stefan Inst, Ljubljana, Slovenia ; Kanagawa Univ, Yokohama, Kanagawa, Japan ; Korea Univ, Seoul 136701, South Korea ; Kyungpook Natl Univ, Taegu 702701, South Korea ; Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol Lausanne, CH-1015 Lausanne, Switzerland ; Univ Ljubljana, Ljubljana, Slovenia ; Univ Maribor, SLO-2000 Maribor, Slovenia ; Univ Melbourne, Melbourne, Vic, Australia ; Nagoya Univ, Nagoya, Aichi, Japan ; Nara Womens Univ, Nara 630, Japan ; Natl Cent Univ, Chungli 32054, Taiwan ; Natl United Univ, Miaoli, Taiwan ; H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland ; Nippon Dent Univ, Niigata, Japan ; Niigata Univ, Niigata, Japan ; Univ Nova Gorica, Nova Gorica, Slovenia ; Osaka City Univ, Osaka 558, Japan ; Osaka Univ, Osaka, Japan ; Panjab Univ, Chandigarh 160014, India ; Peking Univ, Beijing 100871, Peoples R China ; RIKEN BNL Res Ctr, Upton, NY 11973 USA ; Univ Sci & Technol China, Hefei 230026, Peoples R China ; Seoul Natl Univ, Seoul, South Korea ; Shinshu Univ, Nagano, Japan ; Sungkyunkwan Univ, Suwon, South Korea ; Univ Sydney, Sydney, NSW 2006, Australia ; Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India ; Toho Univ, Funabashi, Chiba 274, Japan ; Tohoku Gakuin Univ, Tagajo, Miyagi, Japan ; Tohoku Univ, Sendai, Miyagi 980, Japan ; Univ Tokyo, Dept Phys, Tokyo 113, Japan ; Tokyo Inst Technol, Tokyo 152, Japan ; Tokyo Metropolitan Univ, Tokyo 158, Japan ; Tokyo Univ Agr & Technol, Tokyo, Japan ; Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA ; Yonsei Univ, Seoul 120749, South Korea ; Gyeongsang Natl Univ, Chinju, South Korea |
| 英文摘要 | Using 449x10(6) B(B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we observe clear signals for B+->(K) over bar K-0(+) and B-0 ->(K) over bar K-0(0) decays with 5.3 sigma and 6.0 sigma significance, respectively. We measure the branching fractions B(B+->(K) over bar K-0(+))=(1.22(-0.28-0.16)(+0.32+0.13))x10(-6) and B(B-0 ->(K) over bar K-0(0))=(0.87(-0.20)(+0.25)+/- 0.09)x10(-6), and partial-rate asymmetries A(CP)(B+->(K) over bar K-0(+))=0.13(-0.24)(+0.23)+/- 0.02 and A(CP)(B-0 ->(K) over bar K-0(0))=-0.58(-0.66)(+0.73)+/- 0.04. From a simultaneous fit, we also obtain B(B+-> K-0 pi(+))=(22.8(-0.7)(+0.8)+/- 1.3)x10(-6) and A(CP)(B+-> K-0 pi(+))=0.03 +/- 0.03 +/- 0.01. The first and second error in the branching fractions and the partial-rate asymmetries are statistical and systematic, respectively. No signal is observed for B-0 -> K+K- decays, and for this branching fraction, we set an upper limit of 4.1x10(-7) at the 90% confidence level. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000246210200019 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/241023]  |
| 专题 | 高能物理研究所_实验物理中心 高能物理研究所_粒子天体物理中心 中国科学院高能物理研究所_中国散裂中子源 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Lin, SW,Chang, P,Abe, K,et al. Observation of B decays to two kaons[J]. PHYSICAL REVIEW LETTERS,2007,98(18):181804. |
| APA | Lin, SW.,Chang, P.,Abe, K.,Abe, K.,Adachi, I.,...&Zupanc, A.(2007).Observation of B decays to two kaons.PHYSICAL REVIEW LETTERS,98(18),181804. |
| MLA | Lin, SW,et al."Observation of B decays to two kaons".PHYSICAL REVIEW LETTERS 98.18(2007):181804. |
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来源：高能物理研究所
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