Implication of sin 2 beta from global fit and B -> J/psi K-s
文献类型：期刊论文
| 作者 | Wu, YL ; Zhou, YF; Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
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| 刊名 | INTERNATIONAL JOURNAL OF MODERN PHYSICS A
 |
| 出版日期 | 2001 |
| 卷号 | 16期号:28页码:4547-4565 |
| 关键词 | Cp Violation 2-higgs-doublet Model Unitarity Triangle Standard Model Decays Matrix Quark Constraints Parameter Physics |
| ISSN号 | 0217-751X |
| 英文摘要 | The measurement of sin 2 beta is discussed within and beyond the standard model. In the presence of new physics, the angle beta extracted from the global fit (denoted by beta (SM)(fit)) and the one extracted from B --> J/psiK(S) (denoted by beta (J/psi)) are in general all different from the "true" angle beta which is the weak phase of CKM matrix element V-td*. Possible new physics effects on the ratio R-beta = sin 2 beta (J/psi)/sin2 beta (SM)(fit) is studied and parametrized in a t most general form. It is shown that the ratio R-beta may provide a useful tool in probing new physics. The experimental value of R-beta is obtained through an update of the global fit of the unitarity triangle with the latest data and found to be less than unity at la level. The new physics effects on R-beta from the models with minimum flavor violation (MFV) and the standard model with two-Higgs-doublet (S2HDM) are studied in detail. It is found that the MFV models seem to give a relative large value R-beta greater than or equal to 1. With the current data, this may indicate that this kind of new physics may be disfavored and alternative new physics with additional phases appears more relevant. As an illustration for models with additional phase beyond CKM phase, the S2HDM effects an R-beta are studied and found to be easily coincide with the data due to the flavor changing neutral Higgs interaction. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000172393000004 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/13645]  |
| 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, Beijing 100080, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Wu, YL,Zhou, YF,Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.. Implication of sin 2 beta from global fit and B -> J/psi K-s[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS A,2001,16(28):4547-4565. |
| APA | Wu, YL,Zhou, YF,&Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China..(2001).Implication of sin 2 beta from global fit and B -> J/psi K-s.INTERNATIONAL JOURNAL OF MODERN PHYSICS A,16(28),4547-4565. |
| MLA | Wu, YL,et al."Implication of sin 2 beta from global fit and B -> J/psi K-s".INTERNATIONAL JOURNAL OF MODERN PHYSICS A 16.28(2001):4547-4565. |
入库方式： OAI收割
来源：理论物理研究所
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