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Study of B ->pi l nu and B ->rho l nu decays and determination of vertical bar V-ub vertical bar
BaBar Collaboration
2005
发表期刊PHYSICAL REVIEW D
卷号72期号:5
通讯作者Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France.
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.
关键词SEMILEPTONIC-B FORM-FACTORS
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.72.051102
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000232230000002
引用统计
被引频次:37[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/311005/212596
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. 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).
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