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Implication of sin 2 beta from global fit and B -> J/psi K-s
Wu, YL; Zhou, YF; Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
2001
发表期刊INTERNATIONAL JOURNAL OF MODERN PHYSICS A
ISSN0217-751X
卷号16期号:28页码:4547-4565
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.
部门归属Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Cp Violation 2-higgs-doublet Model Unitarity Triangle Standard Model Decays Matrix Quark Constraints Parameter Physics
学科领域Physics
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收录类别SCI
WOS记录号WOS:000172393000004
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13645
专题理论物理所1978-2010年知识产出
通讯作者Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
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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.
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