徳島大学 教育・研究者情報データベース(EDB)

1. 三重大学

1. 波場 直之

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2. (英) Matsuoka Takeo / (日) 松岡 武夫 / (読) まつおか たけお

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(英) LARGE LEPTON FLAVOR MIXING AND E(6) TYPE UNIFICATION MODELS

(英) There are experimental indications of large flavor mixing between $u_{u }$ and $u_{au}$. In the unification models, in which the massless sector includes extra particles beyond the standard model, there possibly appear the mixings between quarks (leptons) and the extra particles. When large mixings occur, lepton flavor mixings can be quite different from quark flavor mixings. By taking the string inspired $SU(6) imes SU(2)_R$ model with global flavor symmetries, we obtain the neutrino flavor mixing $in heta_{23} imeq ambda = in heta_C$ around the unification scale. It can be expected that due to large Yukawa couplings of neutrinos, the renormalization effect increases $in 2 heta_{23}$ naturally up to $im 1$ at the electroweak scale. Fermion mass spectra and the CKM matrix of quarks obtained in this paper are also phenomenologically viable.

(日) E6GUTにおいてレプトン系の大きな世代間混合を導出する模型を構築した．この模型ではレプトンの2-3世代混合はGUTスケールでカピポ角に等しくなることを示した．