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Branching ratio and CP violation of B ->pi pi decays in the perturbative QCD approach
Lv CD(吕才典); Yang MZ(杨茂志); Lu, CD; Ukai, K; Yang, MZ
2001
发表期刊PHYSICAL REVIEW D
卷号63期号:7页码:74009
通讯作者Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan ; Hiroshima Univ, Dept Phys, Higashihiroshima 7398526, Japan
摘要We calculate the branching ratios and CP asymmetries for B-o -->pi (+)pi (-), B+-->pi (+)pi (o), and B-o --> pi (o)pi (o) decays. in a perturbative QCD approach. In this approach, we calculate nonfactorizable and annihilation type contributions, in addition to the usual factorizable contributions. We find that the annihilation diagram contributions are not very small as previously argued. Our result is in agreement with the measured branching ratio of B --> pi (+)pi (-) by the CLEO Collaboration. With a non-negligible contribution from annihilation diagrams and a large strong phase, we predict a large direct CP asymmetry in B-o --> pi (+)pi (-), and pi (o)pi (o), which can be tested by the current running B factories.
文章类型Article
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics
DOI10.1103/PhysRevD.63.074009
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语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000167792200031
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被引频次:336[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/311005/240774
专题理论物理室
作者单位中国科学院高能物理研究所
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GB/T 7714
Lv CD,Yang MZ,Lu, CD,et al. Branching ratio and CP violation of B ->pi pi decays in the perturbative QCD approach[J]. PHYSICAL REVIEW D,2001,63(7):74009.
APA 吕才典,杨茂志,Lu, CD,Ukai, K,&Yang, MZ.(2001).Branching ratio and CP violation of B ->pi pi decays in the perturbative QCD approach.PHYSICAL REVIEW D,63(7),74009.
MLA 吕才典,et al."Branching ratio and CP violation of B ->pi pi decays in the perturbative QCD approach".PHYSICAL REVIEW D 63.7(2001):74009.
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