Right Handed Neutrinos, TeV Scale BSM Neutral Higgs and FIMP Dark Matter in EFT Framework

TL;DR

This paper presents an effective field theory model with right-handed neutrinos and a singlet scalar, explaining neutrino masses, dark matter, and exploring collider signatures of a TeV-scale BSM Higgs at future colliders.

Contribution

It introduces a novel EFT framework linking TeV-scale BSM Higgs, right-handed neutrinos, and FIMP dark matter, with detailed collider analysis.

Findings

Successful generation of light neutrino masses via seesaw.

Correlation between BSM Higgs vev and dark matter mass.

Potential discovery of TeV-scale BSM Higgs at future 100 TeV collider.

Abstract

We consider an effective field theory framework with three standard model (SM) gauge singlet right handed neutrinos, and an additional SM gauge singlet scalar field. The framework successfully generates eV masses of the light neutrinos via seesaw mechanism, and accommodates a feebly interacting massive particle (FIMP) as dark matter candidate. Two of the gauge singlet neutrinos participate in neutrino mass generation, while the third gauge singlet neutrino is a FIMP dark matter. We explore the correlation between the $\textit{vev}$ of the gauge singlet scalar field which translates as mass of the BSM Higgs, and the mass of dark matter, which arises due to relic density constraint. We furthermore explore the constraints from the light neutrino masses in this set-up. We chose the gauge singlet BSM Higgs in this framework in the TeV scale. We perform a detailed collider analysis to analyse the discovery prospect of the TeV scale BSM Higgs through its di-fatjet signature, at a future $pp$ collider which can operate with $\sqrt{s}=100$ TeV c.m.energy.