# Fermion Dark Matter with Scalar Triplet at Direct and Collider Searches

## TL;DR

This paper explores a fermion dark matter model extended with a scalar triplet, which helps evade direct detection constraints and enhances discovery prospects at LHC and ILC, while also explaining neutrino masses.

## Contribution

The study introduces a scalar triplet extension to fermion dark matter models, improving detection prospects and accommodating neutrino mass generation.

## Key findings

- Scalar triplet allows larger parameter space for dark matter detection.
- Model can be discovered early at ILC with minimal fine-tuning.
- Enhanced complementarity between LHC, ILC, and direct searches.

## Abstract

Fermion dark matter (DM) as an admixture of additional singlet and doublet vector like fermions provides an attractive and allowed framework by relic density and direct search constraints within TeV scale, although limited by its discovery potential at the Large Hadron Collider (LHC). An extension of the model with scalar triplet can yield neutrino masses and provide some cushion to the direct search constraint of the DM through pseudo-Dirac mass splitting. This in turn, allow the model to live in a larger region of the parameter space and open the door for detection at LHC, even if slightly. The model however can see an early discovery at International Linear Collider (ILC) without too much of fine-tuning. The complementarity of LHC, ILC and direct search prospect of this framework is studied in this paper.