The THDMa and possible $e^+e^-$ signatures

TL;DR

This paper explores the THDMa model, a two Higgs doublet model with an extra pseudoscalar acting as a dark matter portal, analyzing its parameter space and potential signatures at future electron-positron colliders.

Contribution

It introduces a comprehensive scan of the THDMa parameter space and discusses novel collider signatures beyond standard THDM searches.

Findings

Parameter space allows wide variation of model parameters.

Potential $e^+e^-$ collider signatures identified.

Enhanced dark matter detection prospects at future colliders.

Abstract

I here discuss the THDMa, a type II two Higgs doublet model that is enhanced by an additional pseudoscalar which serves as a portal to the dark matter sector containing a fermionic dark matter andidate. I present a recent scan of the models parameter space where all parameters are allowed to float freely, and discuss prospects for this model at future $e^+e^-$ colliders for cases that are not covered in standard THDM searches.