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Improved measurements of branching fractions and CP asymmetries in B -> eta h decays

文献类型:期刊论文

作者Belle Collaboration
刊名PHYSICAL REVIEW D
出版日期2007
卷号75期号:7
关键词MONTE-CARLO ETA BELLE VIOLATION DETECTOR PHOTOS
通讯作者Chang, P (reprint author), Natl Taiwan Univ, Dept Phys, Taipei, Taiwan.
英文摘要We report improved measurements of B decays with an eta meson in the final state using 492 fb(-1) of data collected by the Belle detector at the KEKB e(+)e(-) collider. We observe the decays B-+/-->eta pi(+/-) and B-+/-->eta K-+/- and measure the branching fractions B(B-+/-->eta pi(+/-))=(4.2 +/- 0.4(stat)+/- 0.2(sys))x10(-6) and B(B-+/-->eta K-+/-)=(1.9 +/- 0.3(stat)(-0.1)(+0.2)(sys))x10(-6). The corresponding CP-violating asymmetries are measured to be -0.23 +/- 0.09(stat)+/- 0.02(sys) for eta pi(+/-) and -0.39 +/- 0.16(stat)+/- 0.03(sys) for eta K-+/-. We also search for B-0 ->eta K-0 decays and set an upper limit of 1.9x10(-6) at the 90% confidence level.
学科主题Astronomy & Astrophysics; Physics
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
收录类别SCI
语种英语
WOS记录号WOS:000246076700004
公开日期2016-02-26
源URL[http://ir.ihep.ac.cn/handle/311005/212808]  
专题高能物理研究所_实验物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714
Belle Collaboration. Improved measurements of branching fractions and CP asymmetries in B -> eta h decays[J]. PHYSICAL REVIEW D,2007,75(7).
APA Belle Collaboration.(2007).Improved measurements of branching fractions and CP asymmetries in B -> eta h decays.PHYSICAL REVIEW D,75(7).
MLA Belle Collaboration."Improved measurements of branching fractions and CP asymmetries in B -> eta h decays".PHYSICAL REVIEW D 75.7(2007).

入库方式: OAI收割

来源:高能物理研究所

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