Multiple seesaw mechanisms of neutrino masses at the TeV scale

Abstract

In pursuit of a balance between theoretical naturalness and experimental testability, we propose two classes of multiple seesaw mechanisms at the TeV scale to understand the origin of tiny neutrino masses. They are novel extensions of the canonical and double seesaw mechanisms, respectively, by introducing even and odd numbers of gauge-singlet fermions and scalars. It is thanks to a proper implementation of the global U(1)xZ_2N symmetry that the overall neutrino mass matrix in either class has a suggestive nearest-neighbor-interaction pattern. We briefly discuss possible consequences of these TeV-scale seesaw scenarios, which can hopefully be explored in the upcoming Large Hadron Collider and precision neutrino experiments, and present a simple but instructive example of model building.

arXiv comment10 pages, 2 figures, accepted for publication in Phys. Lett. B

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Cited by in corpus (50)

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• Exotic Seesaw-Motivated Heavy Leptons at the LHC
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• The $\mu -\tau$ reflection symmetry of Dirac neutrinos and its breaking effect via quantum corrections
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• Relating the neutrino mixing angles to a lepton mass hierarchy
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• Friedberg-Lee symmetry and tri-bimaximal neutrino mixing in the inverse seesaw mechanism
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