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Measurement of vertical bar V-ub vertical bar from Inclusive Charmless Semileptonic B Decays
Belle Collaboration
2010
发表期刊PHYSICAL REVIEW LETTERS
卷号104期号:2
通讯作者Urquijo, P (reprint author), Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia.
摘要We present the partial branching fraction for inclusive charmless semileptonic B decays and the corresponding value of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-ub vertical bar, using a multivariate analysis method to access similar to 90% of the B -> X(u)l nu phase space. This approach dramatically reduces the theoretical uncertainties from the b-quark mass and nonperturbative QCD compared to all previous inclusive measurements. The results are based on a sample of 657 X 10(6) B (B) over bar pairs collected with the Belle detector. We find that Delta B(B -> X(u)l nu; p(l)*(B) > 1.0 GeV/c) = 1.963X(1 +/- 0.088(stat) +/- 0.081(syst)) X 10(-3). Corresponding values of vertical bar V-ub vertical bar are extracted using several theoretical calculations.
关键词HEAVY-QUARK SYMMETRY MESON DECAYS CP-VIOLATION
学科领域Physics
DOI10.1103/PhysRevLett.104.021801
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000274002900012
引用统计
被引频次:31[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/311005/212926
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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Belle Collaboration. Measurement of vertical bar V-ub vertical bar from Inclusive Charmless Semileptonic B Decays[J]. PHYSICAL REVIEW LETTERS,2010,104(2).
APA Belle Collaboration.(2010).Measurement of vertical bar V-ub vertical bar from Inclusive Charmless Semileptonic B Decays.PHYSICAL REVIEW LETTERS,104(2).
MLA Belle Collaboration."Measurement of vertical bar V-ub vertical bar from Inclusive Charmless Semileptonic B Decays".PHYSICAL REVIEW LETTERS 104.2(2010).
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