New Solution for Neutrino Masses and Leptogenesis in Adjoint SU(5)

Abstract

We investigate baryogenesis via leptogenesis and generation of neutrino masses and mixings through the Type I plus Type III seesaw plus an one-loop mechanism in the context of Renormalizable Adjoint SU(5) theory. One light neutrino remains massless, because the contributions of three heavy Majorana fermions ρ_0, ρ_3 and ρ_8 to the neutrino mass matrix are not linearly independent. However none of these heavy fermions is decoupled from the generation of neutrino masses. This opens a new range in parameter space for successful leptogenesis, in particular, allows for inverted hierarchy of the neutrino masses.

16 pages, 4 figures; references added and typos fixed

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Cited by in corpus (7)

• Leptogenesis in the Universe
• Adjoint SU(5) GUT model with Modular $S_4$ Symmetry
• GUT Scalar Potentials for Higgs Inflation
• Leptogenesis in $E_6\times U(1{)}_A$ SUSY GUT model
• Type I+III Seesaw Mechanism and CP Violation for Leptogenesis
• The minimal adjoint-SU(5)xZ_4 GUT model
• A simple SU(5) model with unification near the Planck scale