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Lepton flavor-changing scalar interactions and g-2 of the muon
Zhou, YF; Wu, YL; Zhou, YF , Univ Munich, Sekt Phys, Theresienstr 37, D-80333 Munich, Germany.
2003
发表期刊EUROPEAN PHYSICAL JOURNAL C
ISSN1434-6044
卷号27期号:4页码:577-585
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.
部门归属Univ Munich, Sekt Phys, D-80333 Munich, Germany; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
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
学科领域Physics
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收录类别SCI
WOS记录号WOS:000182708200009
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
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1978-2010年知识产出
通讯作者Zhou, YF , Univ Munich, Sekt Phys, Theresienstr 37, D-80333 Munich, Germany.
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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[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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