Radiative Seesaw Dark Matter

TL;DR

This paper proposes a radiative seesaw model where a dark Majorana fermion acquires mass via loop processes and is produced as dark matter through Higgs decay, linking neutrino mass and dark matter origin.

Contribution

It introduces a simple extension of the singlet majoron model with dark fermion and scalar singlets, enabling radiative mass generation and Higgs decay-driven dark matter production.

Findings

Dark matter candidate $$ is produced via Higgs decay.

Radiative mass generation links neutrino mass and dark matter.

Model provides a consistent framework for dark matter and neutrino masses.

Abstract

The singlet majoron model of seesaw neutrino mass is appended by one dark Majorana fermion singlet $\chi$ with $L=2$ and one dark complex scalar singlet $\zeta$ with $L=1$. This simple setup allows $\chi$ to obtain a small radiative mass anchored by the same heavy right-handed neutrinos, whereas the one-loop decay of the standard-model Higgs boson to $\chi \chi + \bar{\chi} \bar{\chi}$ provides the freeze-in mechanism for $\chi$ to be the light dark matter of the Universe.