Trinification, the Hierarchy Problem and Inverse Seesaw Neutrino Masses

Abstract

In minimal trinification models light neutrino masses can be generated via a radiative see-saw mechanism, where the masses of the right-handed neutrinos originate from loops involving Higgs and fermion fields at the unification scale. This mechanism is absent in models aiming at solving or ameliorating the hierarchy problem, such as low-energy supersymmetry, since the large seesaw-scale disappears. In this case, neutrino masses need to be generated via a TeV-scale mechanism. In this paper, we investigate an inverse seesaw mechanism and discuss some phenomenological consequences.

10 pages, 11 figures

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• GUT Physics in the era of the LHC
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• Low-energy phenomenology of trinification: an effective left-right-symmetric model
• Reviving trinification models through an ${\mathrm{E}}_6$-extended supersymmetric GUT
• Safe Trinification
• Scale hierarchies, symmetry breaking and particle spectra in SU(3)-family extended SUSY trinification
• The mass of the Higgs boson in the trinification subgroup of E6
• How low-scale Trinification sheds light in the flavour hierarchies, neutrino puzzle, dark matter and leptogenesis
• Threshold effects on prediction for proton decay in non-supersymmetric $E_6$ GUT with intermediate trinification symmetry
• Monopoles, Exotic states and Muon $g-2$ in TeV scale Trinification
• Theorem on vanishing contributions to ${\sin }^2{\theta }_W$ and intermediate mass scale in Grand Unified Theories with trinification symmetry
• Muon $g-2$ Anomaly from Vector-like Leptons in a 2-Higgs-doublet + Scalar Singlet Model
• Low scale trinification symmetry through effects of dimension-5 operators in $E_6$ grand unified theory with and without supersymmetry