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Measurement of the branching fraction and photon energy moments of B -> X-s gamma and A(CP)(B -> Xs+d gamma)
BaBar Collaboration
2006
发表期刊PHYSICAL REVIEW LETTERS
卷号97期号:17
通讯作者Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France.
摘要The photon spectrum in B -> X-s gamma decay, where X-s is any strange hadronic state, is studied using a data sample of 88.5x10(6) e(+)e(-)->Upsilon(4S)-> B(B) over bar decays collected by the BABAR experiment at the Stanford Linear Accelerator Center. The partial branching fraction, Delta B(B -> X-s gamma)=(3.67 +/- 0.29(stat)+/- 0.34(syst)+/- 0.29(model))x10(-4), the first moment < E-gamma >=2.288 +/- 0.025 +/- 0.017 +/- 0.015 GeV, and the second moment < E-gamma(2)>=0.0328 +/- 0.0040 +/- 0.0023 +/- 0.0036 GeV2 are measured for the photon energy range 1.9 GeV < E-gamma < 2.7 GeV. They are also measured for narrower E-gamma ranges. The moments are then fit to recent theoretical calculations to extract the heavy quark expansion parameters m(b) and mu(2)(pi) and to extrapolate the partial branching fraction to E-gamma > 1.6 GeV. In addition, the direct CP asymmetry A(CP)(B -> Xs+d gamma) is measured to be -0.110 +/- 0.115(stat)+/- 0.017(syst).
关键词RADIATIVE B-DECAYS CP VIOLATION ASYMMETRY PHYSICS
学科领域Physics
DOI10.1103/PhysRevLett.97.171803
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000241586800019
引用统计
被引频次:56[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/311005/212736
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 branching fraction and photon energy moments of B -> X-s gamma and A(CP)(B -> Xs+d gamma)[J]. PHYSICAL REVIEW LETTERS,2006,97(17).
APA BaBar Collaboration.(2006).Measurement of the branching fraction and photon energy moments of B -> X-s gamma and A(CP)(B -> Xs+d gamma).PHYSICAL REVIEW LETTERS,97(17).
MLA BaBar Collaboration."Measurement of the branching fraction and photon energy moments of B -> X-s gamma and A(CP)(B -> Xs+d gamma)".PHYSICAL REVIEW LETTERS 97.17(2006).
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