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Measurement of the B ->pi l nu branching fraction and determination of vertical bar V-ub vertical bar with tagged B mesons
BaBar Collaboration
2006
发表期刊PHYSICAL REVIEW LETTERS
卷号97期号:21
通讯作者Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France.
摘要We report a measurement of the B ->pi center dot nu branching fraction based on 211 fb(-1) of data collected with the BABAR detector. We use samples of B-0 and B+ mesons tagged by a second B meson reconstructed in a semileptonic or hadronic decay and combine the results assuming isospin symmetry to obtain B(B-0 ->pi(-)center dot(+)nu)=(1.33 +/- 0.17(stat)+/- 0.11(syst))x10(-4). We determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-ub vertical bar by combining the partial branching fractions measured in ranges of the momentum transfer squared and theoretical calculations of the form factor. Using a recent lattice QCD calculation, we find vertical bar V-ub vertical bar=(4.5 +/- 0.5(stat)+/- 0.3(syst)0.7/0.5(FF))x10(-3), where the last error is due to the normalization of the form factor.
学科领域Physics
DOI10.1103/PhysRevLett.97.211801
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000242219900008
引用统计
被引频次:34[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/311005/212748
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 ->pi l nu branching fraction and determination of vertical bar V-ub vertical bar with tagged B mesons[J]. PHYSICAL REVIEW LETTERS,2006,97(21).
APA BaBar Collaboration.(2006).Measurement of the B ->pi l nu branching fraction and determination of vertical bar V-ub vertical bar with tagged B mesons.PHYSICAL REVIEW LETTERS,97(21).
MLA BaBar Collaboration."Measurement of the B ->pi l nu branching fraction and determination of vertical bar V-ub vertical bar with tagged B mesons".PHYSICAL REVIEW LETTERS 97.21(2006).
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