中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Evidence for Direct CP Violation in B-+/- -> eta h(+/-) and Observation of B-0 -> eta K-0

文献类型:期刊论文

作者Belle Collaboration
刊名PHYSICAL REVIEW LETTERS
出版日期2012
卷号108期号:3
关键词MONTE-CARLO DECAYS DETECTOR PHOTOS ETA
通讯作者Hoi, CT (reprint author), Natl Taiwan Univ, Dept Phys, Taipei, Taiwan.
英文摘要We report measurements of the branching fractions and CP asymmetries for B-+/- -> eta h(+/-) (h = K or pi) and the observation of the decay B-0 -> eta K-0 from the final data sample of 772 x 10(6) B (B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured branching fractions are B(B-+/- -> eta K-+/-) = (2.12 +/- 0.23 +/- 0.11) x 10(-6), B(B-+/- -> eta pi(+/-)) = (4.07 +/- 0.26 +/- 0.21) x 10(-6), and B(B-0 -> eta K-0) = (1.27(-0.29)(+0.33) +/- 0.08) x 10(-6), where the last decay is observed for the first time with a significance of 5.4 standard deviations (sigma). We also find evidence for CP violation in the charged B modes, A(CP)(B-+/- -> eta K-+/-) = -0.38 +/- 0.11 +/- 0.01 and A(CP)(B-+/- -> eta pi(+/-)) = -0.19 +/- 0.06 +/- 0.01 with significances of 3.8 sigma and 3.0 sigma, respectively. For all measurements, the first and second uncertainties are statistical and systematic, respectively.
学科主题Physics
类目[WOS]Physics, Multidisciplinary
收录类别SCI
语种英语
WOS记录号WOS:000299821100001
公开日期2016-02-26
源URL[http://ir.ihep.ac.cn/handle/311005/213170]  
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. Evidence for Direct CP Violation in B-+/- -> eta h(+/-) and Observation of B-0 -> eta K-0[J]. PHYSICAL REVIEW LETTERS,2012,108(3).
APA Belle Collaboration.(2012).Evidence for Direct CP Violation in B-+/- -> eta h(+/-) and Observation of B-0 -> eta K-0.PHYSICAL REVIEW LETTERS,108(3).
MLA Belle Collaboration."Evidence for Direct CP Violation in B-+/- -> eta h(+/-) and Observation of B-0 -> eta K-0".PHYSICAL REVIEW LETTERS 108.3(2012).

入库方式: OAI收割

来源:高能物理研究所

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