Branching ratio and CP asymmetry of B ->pi eta(()'()) decays in the perturbative QCD approach

	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!
通讯作者	Xiao, ZJ (reprint author), Nanjing Normal Univ, Dept Phys, Nanjing 210097, Jiangsu, Peoples R China.
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.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
WOS记录号	WOS:000235745500009
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/227158]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	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!.