Triple seesaw mechanism

TL;DR

This paper introduces a novel seesaw mechanism combining type I and II to naturally produce light neutrino masses at TeV scale, with potential for detection at the LHC.

Contribution

It presents a new formula for neutrino masses suppressed by high-scale M^3 and demonstrates realization within the 3-3-1 model with right-handed neutrinos.

Findings

Neutrino masses suppressed by high-scale M^3

Potential for direct detection at the LHC

Realization within 3-3-1 model with right-handed neutrinos

Abstract

On fitting the type II seesaw mechanism into the type I seesaw mechanism, we obtain a formula to the neutrino masses which get suppressed by high-scale $M^3$ in its denominator. As a result, light neutrinos are naturally obtained with new physics at TeV scale. As interesting consequence, the mechanism may be directly probed at the LHC by directly producing the TeV states intrinsic of the mechanism. We show that the 3-3-1 model with right-handed neutrinos realizes naturally such seesaw mechanism.