Measurement of Beta(B-over-bar(0)-> D(+)l(-)(nu)over-bar) and determination of vertical bar V(cb)vertical bar

	Measurement of Beta(B-over-bar(0)-> D(+)l(-)(nu)over-bar) and determination of vertical bar V(cb)vertical bar
	Belle Collaboration
刊名	PHYSICS LETTERS B
	2002
卷号	526 期号:3--4 页码:258-268
关键词	FORM-FACTORS BRANCHING FRACTIONS DISPERSIVE BOUNDS DECAYS MODEL
通讯作者	Abe, K (reprint author), High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan.
英文摘要	We present a measurement of the branching fraction for the semileptonic B decay (B) over bar (0) --> D(+)l(-)(v) over bar, where l(-) can be either an electron or a muon. We find Gamma((B) over bar (0) --> D(+)l(-)(v) over bar) = (13.79 +/- 0.76 +/- 2.51) ns(-1), and the resulting branching fraction B((B) over bar (0) --> D(+)e(-)(v) over bar) = (2.13 +/- 0.12 +/- 0.39)%, where the first error is statistical and the second systematic. We also investigate the (B) over bar (0) --> D(+)l(-)(v) over bar form factor and the implications of the result for \V(cb)\. From a fit to the differential decay distribution we obtain the rate normalization \V(cb)\F(D)(1) = (4.11 +/- 0.44 +/- 0.52) X 10(-2). Using a theoretical calculation of F(D)(1), the Cabibbo-Kobayashi-Maskawa matrix element \V(cb)\ = (4.19 +/- 0.45 +/- 0.53 +/- 0.30) x 10(-2) is obtained, where the last error comes from the theoretical uncertainty of F(D)(1). The results are based on a data sample of 10.2 fb(-1) recorded at the gamma(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. (C) 2002 Elsevier Science B.V. All rights reserved.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:000173827100009
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/212172]
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	Belle Collaboration. Measurement of Beta(B-over-bar(0)-> D(+)l(-)(nu)over-bar) and determination of vertical bar V(cb)vertical bar[J]. PHYSICS LETTERS B,2002,526(3--4):258-268.
APA	Belle Collaboration.(2002).Measurement of Beta(B-over-bar(0)-> D(+)l(-)(nu)over-bar) and determination of vertical bar V(cb)vertical bar.PHYSICS LETTERS B,526(3--4),258-268.
MLA	Belle Collaboration."Measurement of Beta(B-over-bar(0)-> D(+)l(-)(nu)over-bar) and determination of vertical bar V(cb)vertical bar".PHYSICS LETTERS B 526.3--4(2002):258-268.