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Moments of the electron energy spectrum and partial branching fraction of B -> X(c)e nu decays at the Belle detector
Belle Collaboration
2007
发表期刊PHYSICAL REVIEW D
卷号75期号:3
通讯作者Urquijo, P (reprint author), Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
摘要We report a measurement of the inclusive electron energy spectrum for charmed semileptonic decays of B mesons in a 140 fb(-1) data sample collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+) e(-) collider. We determine the first four moments of the electron energy spectrum for threshold values of the electron energy between 0.4 and 2.0 GeV. In addition, we provide values of the partial branching fraction (zeroth moment) for the same electron threshold energies, and independent measurements of the B+ and B-0 partial branching fractions at 0.4 GeV and 0.6 GeV electron threshold energies. We measure the independent B+ and B-0 partial branching fractions with electron threshold energies of 0.4 GeV to be Delta B(B+ -> X(c)ev) = (10.79 +/- 0.25 (stat.) +/- 0.27 (sys.))% and Delta B(B-0 -> X(c)ev) = (10.08 +/- 0.30 (stat.) +/- 0.22 (sys.))%. Full correlations between all measurements are evaluated.
关键词SEMILEPTONIC B-DECAY HEAVY-QUARK SYMMETRY MESON DECAYS QCD DISTRIBUTIONS MODELS
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.75.032001
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000244534800008
引用统计
被引频次:32[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/311005/212788
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. Moments of the electron energy spectrum and partial branching fraction of B -> X(c)e nu decays at the Belle detector[J]. PHYSICAL REVIEW D,2007,75(3).
APA Belle Collaboration.(2007).Moments of the electron energy spectrum and partial branching fraction of B -> X(c)e nu decays at the Belle detector.PHYSICAL REVIEW D,75(3).
MLA Belle Collaboration."Moments of the electron energy spectrum and partial branching fraction of B -> X(c)e nu decays at the Belle detector".PHYSICAL REVIEW D 75.3(2007).
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