A scalar sextet generates eV-scale Dirac neutrino masses in a 3-3-1 model, and the associated right-handed neutrino population constrains the Z' boson mass to exceed 4.4 TeV.
KeV right-handed neutrinos from type II seesaw mechanism in a 3-3-1 model
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abstract
We adapt the type II seesaw mechanism to the framework of the 3-3-1 model with right-handed neutrinos. We emphasize that the mechanism is capable of generating small masses for the left-handed and right-handed neutrinos and the structure of the model allows that both masses arise from the same Yukawa coupling. For typical values of the free parameters of the model we may obtain at least one right-handed neutrino with mass in the KeV range. Right-handed neutrino with mass in this range is a viable candidate for the warm component of the dark matter existent in the universe.
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Type-II Seesaw Mechanism for Dirac Neutrinos and its Implications on $N_{\text{eff}}$ and Lepton Flavor Violation in a 3-3-1 model
A scalar sextet generates eV-scale Dirac neutrino masses in a 3-3-1 model, and the associated right-handed neutrino population constrains the Z' boson mass to exceed 4.4 TeV.