Phenomenology of the dark matter sector in the 2HDM extended with complex scalar singlet

TL;DR

This paper explores the dark matter phenomenology within the 2HDM extended by a complex scalar singlet, analyzing parameter space constraints and potential collider signatures for future experiments.

Contribution

It provides a comprehensive analysis of the dark matter candidate in the 2HDMS model, including constraints and benchmark scenarios for collider detection.

Findings

Parameter space consistent with current constraints identified

Potential collider signatures at HL-LHC and future $e^+e^-$ colliders discussed

Benchmark scenarios for discovery potential proposed

Abstract

The two-Higgs-doublet model augmented with a complex scalar singlet (2HDMS) is a well-motivated candidate for Beyond Standard Model (BSM) Physics. We investigate the dark matter phenomenology of the 2HDMS with the complex scalar singlet as the dark matter candidate. We perform a study of the parameter space allowed by existing theoretical and experimental constraints from dark matter, flavour physics and collider searches. Further, we discuss a few benchmark scenarios to test the discovery potential for the 2HDMS at the HL-LHC and at future high-energy $e^+e^-$ colliders.