Study of B ->pi l nu and B ->rho l nu decays and determination of vertical bar V-ub vertical bar

	Study of B ->pi l nu and B ->rho l nu decays and determination of vertical bar V-ub vertical bar
	BaBar Collaboration
刊名	PHYSICAL REVIEW D
	2005
卷号	72 期号:5
关键词	SEMILEPTONIC-B FORM-FACTORS
通讯作者	Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France.
英文摘要	We present an analysis of exclusive charmless semileptonic B-meson decays based on 83x10(6) B (B) over bar pairs recorded with the BABAR detector at the Upsilon(4S) resonance. Using isospin symmetry, we measure branching fractions B(B-0->pi(-)l(+)nu)=(1.38 +/- 0.10 +/- 0.16 +/- 0.08)x10(-4) and B(B-0->rho(-)l(+)nu)=(2.14 +/- 0.21 +/- 0.48 +/- 0.28)x10(-4), where the errors are statistical, experimental systematic, and due to form-factor shape uncertainties. We compare the measured distribution in q(2), the momentum-transfer squared, with theoretical predictions for the form factors from lattice QCD and light-cone sum rules, and extract the Cabibbo-Kobayashi-Maskawa (CKM) matrix element \V-ub\=(3.82 +/- 0.14 +/- 0.22 +/- 0.11(-0.52)(+0.88))x10(-3) from B ->pi l nu, where the fourth error reflects the uncertainty of the form-factor normalization.
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:000232230000002
公开日期	2016-02-26
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/212596]
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. Study of B ->pi l nu and B ->rho l nu decays and determination of vertical bar V-ub vertical bar[J]. PHYSICAL REVIEW D,2005,72(5).
APA	BaBar Collaboration.(2005).Study of B ->pi l nu and B ->rho l nu decays and determination of vertical bar V-ub vertical bar.PHYSICAL REVIEW D,72(5).
MLA	BaBar Collaboration."Study of B ->pi l nu and B ->rho l nu decays and determination of vertical bar V-ub vertical bar".PHYSICAL REVIEW D 72.5(2005).