The seesaw mechanism at TeV scale in the 3-3-1 model with right-handed neutrinos

TL;DR

This paper demonstrates that the seesaw mechanism can operate at the TeV scale within a 3-3-1 model with right-handed neutrinos, predicting light right-handed neutrinos that could be experimentally detectable.

Contribution

It introduces a scalar sextet and lepton number violation in the 3-3-1 model, enabling TeV-scale seesaw mechanism with testable right-handed neutrino masses.

Findings

Seesaw mechanism works at TeV scale with right-handed neutrino masses from MeV to tens of GeV.

Majoron identified as a singlet, safe under electroweak constraints.

Potential for experimental detection of right-handed neutrinos at current colliders.

Abstract

We implement the seesaw mechanism in the 3-3-1 model with right-handed neutrinos. This is accomplished by the introduction of a scalar sextet into the model and the spontaneous violation of the lepton number. We identify the Majoron as a singlet under $SU_L(2)\otimes U_Y(1)$ symmetry, which makes it safe under the current bounds imposed by electroweak data. The main result of this work is that the seesaw mechanism works already at TeV scale with the outcome that the right-handed neutrino masses lie in the electroweak scale, in the range from MeV to tens of GeV. This window provides a great opportunity to test their appearance at current detectors, though when we contrast our results with some previous analysis concerning detection sensitivity at LHC, we conclude that further work is needed in order to validate this search.