High Scale Type-II Seesaw, Dominant Double Beta Decay within Cosmological Bound and Verifiable LFV Decays in SU(5)

Abstract

Very recently a novel implementation of type-II seesaw mechanism for neutrino mass has been proposed in SU(5) grand unified theory with a number of desirable new physical phenomena beyond the standard model.Introducing heavy right-haded neutrinos and extra fermion singlets, in this work we show how the type-I seeaw cancellation mechanism works in this SU(5) framework. Besides predicting verifiable LFV decays, we further show that the model predicts dominant double beta decay with normal hierarchy or inverted hierarchy of active light neutrino masses in concordance with cosmological bound. In addition, a novel mechanism for heavy right-handed neutrino mass generation independent of type-II seesaw predicted mass hierarchy, is suggested in this work.

37 pages, LaTeX, 9 figures; accepted version by Advances in High Energy Physics

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Cited by in corpus (7)

• Unification, Proton Decay and Topological Defects in non-SUSY GUTs with Thresholds
• Stitching an Asymmetric Texture with ${\mathcal{T}}_{13}\times {\mathcal{Z}}_5$ Family Symmetry
• Type I + II Seesaw in a Two Higgs Doublet Model
• Tribimaximal Mixing in the $SU(5)\times {\mathcal{T}}_{13}$ Texture
• Unification Predictions With or Without Supersymmetry
• SU(5) unification of two triplet seesaw and leptogenesis with dark matter and vacuum stability
• Scalar-induced Neutrinoless Double Beta Decay in $SU(5)$