Unified Explanation of Quark and Lepton Masses and Mixings in the Supersymmetric SO(10) Model

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  • Unified Description of Quark and Lepton Masses and Mixings in Supersymmetric SO(10) Model

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We discussed neutrino masses and mixings in SUSY SO(10) model where quarks and leptons have Yukawa couplings to two 10 and one <126>^^^- Higgs scalars. In this model, the Dirac and the right-handed Majorana mass terms are expressed by linear combinations of quark and charged lepton mass matrices, which then determine the neutrino mass matrix by the seesaw mechanism. We show that there are various solutions to reproduce a large mixing angle for ν_μ-ν_γ and a small mixing angle for ν_e-ν_μ, as well as the hierarchical mass spectrum of neutrinos.

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