QCD approach to B -> D pi decays and CP violation
文献类型：期刊论文
| 作者 | Su Fang; Wu Yue-Liang ; Yang Ya-Dong; Zhuang Ci; Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100080, Peoples R China
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| 刊名 | COMMUNICATIONS IN THEORETICAL PHYSICS
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| 出版日期 | 2008 |
| 卷号 | 49期号:3页码:707-716 |
| 关键词 | Preserving Loop Regularization Landau Gauge Qcd Infrared Behavior Symmetry-breaking Weak Decays B-mesons Factorization Renormalization Amplitudes Charmless |
| ISSN号 | 0253-6102 |
| 英文摘要 | The branching ratios and CP violations of the B -> D pi decays, including both the color-allowed and the color-suppressed modes, are investigated in detail within QCD framework by considering all diagrams that lead to three effective currents of two quarks. An intrinsic mass scale as a dynamical gluon mass is introduced to treat the infrared divergence caused by the soft collinear approximation in the endpoint regions, and the Cutkosky rule is adopted to deal with a physical-region singularity of the on mass-shell quark propagators. When the dynamical gluon mass mu(g) is regarded as a universal scale, it is extracted to be around mu(g) = 440 MeV from one of the well-measured B -> D pi decay modes. The resulting predictions for all branching ratios are in agreement with the current experimental measurements. As these decays have no penguin contributions, there are no direct CP asymmetries. Due to interference between the Cabibbo-suppressed and the Cabibbo-favored amplitudes, mixing-induced CP violations are predicted in the B -> D-+/-pi(-/+) decays to be consistent with the experimental data at 1-sigma level. More precise measurements will be helpful to extracting weak angle 2 beta + gamma. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000254252700039 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5559]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su Fang,Wu Yue-Liang,Yang Ya-Dong,et al. QCD approach to B -> D pi decays and CP violation[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2008,49(3):707-716. |
| APA | Su Fang,Wu Yue-Liang,Yang Ya-Dong,Zhuang Ci,&Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100080, Peoples R China.(2008).QCD approach to B -> D pi decays and CP violation.COMMUNICATIONS IN THEORETICAL PHYSICS,49(3),707-716. |
| MLA | Su Fang,et al."QCD approach to B -> D pi decays and CP violation".COMMUNICATIONS IN THEORETICAL PHYSICS 49.3(2008):707-716. |
入库方式： OAI收割
来源：理论物理研究所
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