An Alternate Left-Right Symmetric Model with Dirac Neutrinos

TL;DR

This paper proposes a novel Left-Right Symmetric Model with Dirac neutrinos, where neutrino masses are generated via loop processes involving a light charged Higgs, aligning with neutrino oscillation data.

Contribution

It introduces a variant of the Left-Right Symmetric Model without bi-doublet scalars, utilizing heavy vector-like fermions and scalar multiplets to generate neutrino masses and charged fermion masses.

Findings

Model can produce neutrino masses consistent with oscillation data

Light charged Higgs can have GeV-scale mass and influence neutrino mass generation

Potential collider signatures for charged Higgs discussed

Abstract

We study a different variant of Left-Right Symmetric Model, incorporating Dirac type neutrinos. In the absence of the bi-doublet scalars, the possibility of a universal seesaw type of mass generation mechanism for all the Standard Model charged fermions have been discussed. The model has been constructed by extending the Standard Model particle spectrum with heavy vector-like fermions as well as different scalar multiplets. We have shown that this model can generate non zero neutrino mass through loop mediated processes. The parameters which are involved in neutrino mass generation mechanism can satisfy the neutrino oscillation data for both normal and inverted hierarchy. The lightest charged Higgs plays a crucial role in neutrino mass generation mechanism and can have mass of $\mathcal{O}[\text{GeV}]$. We have systematically studied different constraints which are relevant for the charged Higgs phenomenology. In addition to that we also briefly discuss discovery prospects of the charged Higgs at different colliders.