Lepton flavor-changing scalar interactions and g-2 of the muon

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	Zhou, YF; Wu, YL; Zhou, YF , Univ Munich, Sekt Phys, Theresienstr 37, D-80333 Munich, Germany.
	Lepton flavor-changing scalar interactions and g-2 of the muon
发表期刊	EUROPEAN PHYSICAL JOURNAL C
关键词	Anomalous Magnetic-moment 2 Higgs Doublets Cp Violation Charged-higgs Supersymmetry Breaking 2-higgs-doublet Model 2-loop Contributions Extra Dimensions Neutral Currents Standard Model
摘要	A systematic investigation on the muon's anomalous magnetic moment and a related lepton flavor-violating process such as mu --> egamma, tau --> egamma and tau --> mugamma is made at the two-loop level in the models with flavor-changing scalar interactions. The two-loop diagrams with double scalar exchanges are studied and their contributions are found to be compatible with the ones from the Barr-Zee diagram. By comparing with the latest data, the allowed ranges for the relevant Yukawa couplings Y-ij in the lepton sector are obtained. The results show the hierarchical structure Y-mue,Y-taue much less than Y-mutau similar or equal to Y-mumu in the physical basis if Deltaalpha(mu) is found to be > 50 x 10(-11). It deviates from the widely used ansatz in which the off-diagonal elements are proportional to the square root of the products of the related fermion masses. An alternative Yukawa coupling matrix in the lepton sector is suggested to understand the current data. With such a reasonable Yukawa coupling ansatz, the decay rate of tau --> mugamma is found to be near the current experiment upper bound.
	2003
ISSN	1434-6044
卷号	27 期号:4 页码:577-585
学科领域	Physics
收录类别	SCI
引用统计
文献类型	期刊论文
条目标识符	http://ir.itp.ac.cn/handle/311006/13325
专题	理论物理所科研产出_SCI论文
通讯作者	Zhou, YF , Univ Munich, Sekt Phys, Theresienstr 37, D-80333 Munich, Germany.
推荐引用方式 GB/T 7714	Zhou, YF,Wu, YL,Zhou, YF , Univ Munich, Sekt Phys, Theresienstr 37, D-80333 Munich, Germany.. Lepton flavor-changing scalar interactions and g-2 of the muon[J]. EUROPEAN PHYSICAL JOURNAL C,2003,27(4):577-585.
APA	Zhou, YF,Wu, YL,&Zhou, YF , Univ Munich, Sekt Phys, Theresienstr 37, D-80333 Munich, Germany..(2003).Lepton flavor-changing scalar interactions and g-2 of the muon.EUROPEAN PHYSICAL JOURNAL C,27(4),577-585.
MLA	Zhou, YF,et al."Lepton flavor-changing scalar interactions and g-2 of the muon".EUROPEAN PHYSICAL JOURNAL C 27.4(2003):577-585.

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