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Measurement of the (B)over-bar(0)-> D(*+)l(-)(nu)over-bar(l) decay rate and vertical bar V-cb vertical bar
BaBar Collaboration
2005
发表期刊PHYSICAL REVIEW D
卷号71期号:5
通讯作者Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France.
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).
关键词FORM-FACTORS SEMILEPTONIC DECAY DISPERSIVE BOUNDS MESON DECAYS HEAVY MESONS
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.71.051502
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000228490000008
引用统计
被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/212529
专题实验物理中心
作者单位中国科学院高能物理研究所
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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).
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