Branching ratio and CP asymmetry of B ->pi eta(()'()) decays in the perturbative QCD approach
Wang, HS; Liu, X; Xiao, ZJ; Guo, LB; Lu, CD
刊名NUCLEAR PHYSICS B
2006
卷号738期号:1-2页码:#REF!
学科分类Physics
DOI10.1016/j.nuclphysb.2006.01.021
通讯作者Xiao, ZJ (reprint author), Nanjing Normal Univ, Dept Phys, Nanjing 210097, Jiangsu, Peoples R China.
文章类型Article
英文摘要We calculate the branching ratios and CP-violating asymmetries for B-0 -> pi(0)eta((')) and B+ -> pi(+)eta((')) decays in the perturbative QCD (pQCD) factorization approach here. We not only calculate the usual factorizable contributions, but also evaluate the non-factorizable and annihilation type contributions. Besides the current-current operators, the contributions from the QCD and electroweak penguin operators are also taken into account. The pQCD results for the CP-averaged branching ratios are Br(B+ -> pi(+) eta) approximate to 4.1 x 10(-6), Br(B+ -> pi(+)eta') approximate to 2.4 x 10(-6), and Br(B-0 -> pi(0)eta(('))) approximate to 0.2 x 10(-6), which agree very well with the measured values or currently available experimental upper limits. We also predict large CP-violating asymmetries in these decays: A(CP)(dir) (pi (+/-) eta(('))) similar to A(CP)(dir) (pi(0)eta(('))) similar to -0.35, and A(CP)(mix)(pi(0)eta(('))) similar to 0.67, but with large errors. The pQCD prediction for A(CP)(dir) (pi (+/-) eta) (A(CP)(dir) (pi (+/-) eta')) has the same (opposite) sign with the pri mary measured values. Further improvements in both theory and experiments are needed to clarify this discrepancy. (c) 2006 Elsevier B.V. All rights reserved.
类目[WOS]Physics, Particles & Fields
收录类别SCI
WOS记录号WOS:000235745500009
引用统计
被引频次:33[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/311005/227158
专题中国科学院高能物理研究所_理论物理室_期刊论文
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Wang, HS,Liu, X,Xiao, ZJ,et al. Branching ratio and CP asymmetry of B ->pi eta(()'()) decays in the perturbative QCD approach[J]. NUCLEAR PHYSICS B,2006,738(1-2):#REF!.
APA Wang, HS,Liu, X,Xiao, ZJ,Guo, LB,&Lu, CD.(2006).Branching ratio and CP asymmetry of B ->pi eta(()'()) decays in the perturbative QCD approach.NUCLEAR PHYSICS B,738(1-2),#REF!.
MLA Wang, HS,et al."Branching ratio and CP asymmetry of B ->pi eta(()'()) decays in the perturbative QCD approach".NUCLEAR PHYSICS B 738.1-2(2006):#REF!.
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