The Higgs sector of a 3-3-1 model with right-handed neutrinos to be tested at the LHC

TL;DR

This paper investigates the scalar sector of a 3-3-1 gauge model with right-handed neutrinos, analyzing its phenomenological implications for the LHC and identifying potential scalar mass hierarchies within a plausible TeV-scale symmetry breaking scenario.

Contribution

It introduces a flexible theoretical approach to the scalar sector of the 3-3-1 model, accommodating different symmetry breaking mechanisms and predicting specific scalar mass hierarchies.

Findings

Two neutral scalars with masses below 246 GeV exhibit a 2:1 mass ratio.

A third scalar can be very heavy, comparable to the symmetry breaking scale.

A viable symmetry breaking scale is in the 1-10 TeV range.

Abstract

We explore in this paper certain phenomenological consequences - to be tested at the LHC - regarding the scalar sector of a SU(3)xSU(3)xU(1) gauge model with right-handed neutrinos. Our analysis is performed in a particular theoretical approach of treating gauge models with spontaneous symmetry breaking in which a single free parameter 'a' finally remains to be tuned, once all the Standard Model phenomenology is recovered. It is also proved that this particular method is flexible enough as to accommodate the traditional approach in which three VEVs supply masses for gauge bosons and fermions, while three accompanying neutral scalars survive the SSB and take part in various interactions. Two of them exhibit a hierarchy m(H3) = 2m(H2) with masses below the SM scale 246 GeV (independently of the parameter 'a') and the third one coming out very heavy (depending on 'a'), at a mass comparable to the overall breaking scale <phi>. A plausible scenario implying <phi> in 1 - 10 TeV is then exploited.