# Study of Electroweak Vacuum Stability from Extended Higgs Portal of Dark Matter and Neutrinos

## TL;DR

This paper explores how extending the Standard Model with additional scalars and neutrinos can stabilize the electroweak vacuum, accommodate scalar dark matter, and satisfy experimental constraints.

## Contribution

It introduces a model with two singlet scalars and right-handed neutrinos that simultaneously addresses dark matter, neutrino masses, and vacuum stability.

## Key findings

- Scalar dark matter mass window below 500 GeV identified.
- Model consistent with neutrino mass and relic density constraints.
- Electroweak vacuum stability achieved up to the Planck scale.

## Abstract

We investigate the electroweak vacuum stability in an extended version of the Standard Model which incorporates two additional singlet scalar fields and three right handed neutrinos. One of these extra scalars plays the role of dark matter while the other scalar not only helps in making the electroweak vacuum stable but also opens up the low mass window of the scalar singlet dark matter (< 500 GeV). We consider the effect of large neutrino Yukawa coupling on the running of Higgs quartic coupling. We have analyzed the constraints on the model and identify the range of parameter space which is consistent with neutrino mass, appropriate relic density and direct search limits from the latest XENON 1T preliminary result as well as in realizing the stability of the electroweak vacuum upto the Planck scale.