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ID 52545
ファイル
言語
英語
著者
清水 康弘
内容記述(抄録等)
We present a model that gives a natural explanation to the charged lepton mass hierarchy and study the contributions to the electron and the muon g-2 . In the model, we introduce lepton-flavor-dependent U(1)F symmetry and three additional Higgs doublets with U(1)F charges, to realize that each generation of charged leptons couples to one of the three additional Higgs doublets. The U(1)F symmetry is softly broken by +1 charges, and the smallness of the soft breaking naturally gives rise to the hierarchy of the Higgs vacuum expectation values, which then accounts for the charged lepton mass hierarchy. Since electron and muon couple to different scalar particles, each scalar contributes to the electron and the muon g-2 differently. We survey the space of parameters of the Higgs sector and find that there are sets of parameters that explain the muon g-2 discrepancy. On the other hand, we cannot find parameter sets that can explain the g-2 discrepancy within 2 σ⁠. Here, the U(1)F symmetry suppresses charged lepton flavor violation.
掲載誌名
Progress of Theoretical and Experimental Physics
2020
9
ISSN
2050-3911
発行日
2020-09-13
DOI
出版者
The Physical Society of Japan
資料タイプ
学術雑誌論文
ファイル形式
PDF
著者版/出版社版
出版社版
業績ID
e37647
e38987
部局
総合理工学部