# Inverse Seesaw and Portal Dark Matter

## TL;DR

This paper explores a model combining inverse seesaw neutrino masses with scalar-Higgs portal dark matter, analyzing how the singlet scalar mediates between dark matter and the Standard Model within experimental constraints.

## Contribution

It introduces a novel framework where the singlet scalar links inverse seesaw neutrino masses to scalar portal dark matter, with a detailed numerical analysis of the parameter space.

## Key findings

- Scalar vacuum expectation value is near the weak scale.
- Feasible parameter space satisfies direct and indirect detection constraints.
- The singlet scalar effectively mediates between dark matter and Standard Model.

## Abstract

We study the phenomenology of the inverse seesaw mechanism in the scalar-Higgs portal dark matter model. The model is an extension of the Standard Model including two additional neutrinos, a singlet scalar and a fermionic dark matter. We consider the inverse seesaw mechanism where the mass of 2 additional neutrinos are made dynamic by the singlet scalar. We found that the natural scale for the scalar vacuum expectation value is naturally close to the weak scale. Motivating by this fact, we focus on the possibility of the singlet scalar connecting with dark matter, i.e., the scalar is also the mediator between dark sector and the Standard Model. We perform a numerical analysis over the parameter space subject to the indirect and direct detection constraints. The feasible region of the parameter space will be discussed.