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

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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LaTeX, 32 pages including 15 eps figures

Scientific paper

10.1103/PhysRevD.59.055001

We discussed neutrino masses and mixings in SUSY SO(10) model where quarks and leptons have Yukawa couplings to at least two 10 and one $\bar{126}$ 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 see-saw mechanism. We show that there are various solutions to reproduce a large mixing angle for $\nu_\mu-\nu_\tau$ and a small mixing angle for $\nu_e-\nu_\mu$, as well as the hierarchical mass spectrum of neutrinos.

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