Measurements of the B -> X-s gamma branching fraction and photon spectrum from a sum of exclusive final states
文献类型：期刊论文
| 作者 | BaBar Collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2005 |
| 卷号 | 72期号:5 |
| 关键词 | RARE-B-DECAYS HEAVY-QUARK PARAMETERS QCD B->S-GAMMA DETECTOR MOMENTS PHYSICS SCHEME GAMMA RATIO |
| 通讯作者 | Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France. |
| 英文摘要 | Using 88.9 million B (B) over bar events collected by the BABAR detector at the Upsilon(4S), we measure the branching fraction for the radiative penguin process B -> X(s)gamma from the sum of 38 exclusive final states. The inclusive branching fraction above a minimum photon energy E-gamma> 1.9 GeV is B(b -> s gamma)=(3.27 +/- 0.18(stat)(-0.40)(+0.55)(syst)(-0.09)(+0.04)(theory))x10(-4). We also measure the isospin asymmetry between B--> X(s (u) over bar)gamma and (B) over bar (0)-> X(s (d) over bar)gamma to be Delta(0-)=-0.006 +/- 0.058(stat)+/- 0.009(syst)+/- 0.024((B) over bar (0)/B-). The photon energy spectrum is measured in the B rest frame, from which moments are derived for different values of the minimum photon energy. We present fits to the photon spectrum and moments which give the heavy-quark parameters m(b) and mu(pi)(2). The fitted parameters are consistent with those obtained from semileptonic B -> X(c)l nu decays, and are useful inputs for the extraction of \V-ub\ from measurements of semileptonic B -> X(u)l nu decays. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000232230000016 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212602]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 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 | BaBar Collaboration. Measurements of the B -> X-s gamma branching fraction and photon spectrum from a sum of exclusive final states[J]. PHYSICAL REVIEW D,2005,72(5). |
| APA | BaBar Collaboration.(2005).Measurements of the B -> X-s gamma branching fraction and photon spectrum from a sum of exclusive final states.PHYSICAL REVIEW D,72(5). |
| MLA | BaBar Collaboration."Measurements of the B -> X-s gamma branching fraction and photon spectrum from a sum of exclusive final states".PHYSICAL REVIEW D 72.5(2005). |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。