Solar Neutrino Oscillations with Large Mixing Angle MSW Solution in an Extended Zee Model(SUMMER INSTITUTE 2001, Session 2: Phenomenology)
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概要
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We show that the large solar neutrino mixing characterized by sin^2 2θ_<12> 〜 0.8 is accommodated in an extended Zee model with a triplet Higgs scalar (s) as well as the standard Higgs scalar (φ), its copy (φ') and a singly charged scalar (h^+). The model offers two global symmetries associated with the numbers of φ and φ', N_<φ,φ'>, where N_φ+N_<φ'> coincides with the hypercharge while N_φ-N_φ'(≡X) is a new conserved charge, which is identical to L_e-L_μ-L_γ for the left-handed leptons. Neutrino masses are radiatively generated by h^+ with X=0 for ν_e-ν_μ and ν_e-ν_γ mixings responsible for solar neutrino masses and also supplied by s with X=2 at the tree-level for mass terms of ν_iν_j (i, j-μ, γ) responsible for atmospheric neutrino masses. Similarly, charged lepton masses are generated by φ with X=1 for e-μ, and e-γ mixings and by φ' with X=-1 for mass terms of μ and γ. The rotation effects on neutrino masses due to the e-μ, and e-γ mixings, which are converted into the electron mass, are crucial for the large solar neutrino mixing.
- 素粒子論グループ 素粒子研究編集部の論文
- 2002-03-20
著者
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Yasue Masaki
Department Of Natural Science School Of Marine Science And Technology Tokai University:department Of
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Kitabayashi Teruyuki
Accelerator Engineering Center Mitsubishi Electric System & Service Engineering Co. Ltd.
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Kitabayashi T
Accelerator Engineering Center Mitsubishi Electric System & Service Engineering Co. Ltd.
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Kitabayashi Teruyuki
Department Of Physics Tokai University
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Yasue Masaki
Accelerator Engineering Center Mitsubishi Electric System & Service Engineering Co. Ltd.
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