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题名: Lepton flavor-changing scalar interactions and g-2 of the muon
作者: Zhou, YF ;  Wu, YL
刊名: EUROPEAN PHYSICAL JOURNAL C
出版日期: 2003
卷号: 27, 期号:4, 页码:577-585
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
学科分类: Physics
通讯作者: Zhou, YF , Univ Munich, Sekt Phys, Theresienstr 37, D-80333 Munich, Germany.
部门归属: Univ Munich, Sekt Phys, D-80333 Munich, Germany; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: 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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000182708200009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13325
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Zhou, YF,Wu, YL. Lepton flavor-changing scalar interactions and g-2 of the muon[J]. EUROPEAN PHYSICAL JOURNAL C,2003,27(4):577-585.
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