Measurement of the (B)over-bar(0)-> D(*+)l(-)(nu)over-bar(l) decay rate and vertical bar V-cb vertical bar
文献类型：期刊论文
| 作者 | BaBar Collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2005 |
| 卷号 | 71期号:5 |
| 关键词 | FORM-FACTORS SEMILEPTONIC DECAY DISPERSIVE BOUNDS MESON DECAYS HEAVY MESONS |
| 通讯作者 | Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France. |
| 英文摘要 | We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V(cb)vertical bar based on a sample of about 53 700 (B) over bar (0) -> D*(+)l(-)(nu) over bar (l) decays observed by the BABAR detector. We obtain the branching fraction averaged over l = e, mu, B((B) over bar (0) -> D*(+)l(-)(nu) over bar (l)) = (4.90 +/- 0.07(stat.)(-0.35)(+0.36)(syst.))%. We measure the differential decay rate as a function of iv, the relativistic boost gamma of the D*+ in the Wo rest frame. By extrapolating d Gamma/dw to the kinematic limit w -> 1, we extract the product of vertical bar V(cb)vertical bar and the axial form factor A(1)(w = 1). We combine this measurement with a lattice QCD calculation of A(1)(w = 1) to determine vertical bar V(cb)vertical bar = (38.7 +/- 0.3(stat.) +/- 1.7(syst.)(-1.3)(+1.5)(theory)) x 10(-3). |
| 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:000228490000008 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212529]  |
| 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. Measurement of the (B)over-bar(0)-> D(*+)l(-)(nu)over-bar(l) decay rate and vertical bar V-cb vertical bar[J]. PHYSICAL REVIEW D,2005,71(5). |
| APA | BaBar Collaboration.(2005).Measurement of the (B)over-bar(0)-> D(*+)l(-)(nu)over-bar(l) decay rate and vertical bar V-cb vertical bar.PHYSICAL REVIEW D,71(5). |
| MLA | BaBar Collaboration."Measurement of the (B)over-bar(0)-> D(*+)l(-)(nu)over-bar(l) decay rate and vertical bar V-cb vertical bar".PHYSICAL REVIEW D 71.5(2005). |
入库方式： OAI收割
来源：高能物理研究所
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