The THDMa revisited -- A preview

TL;DR

This paper presents preliminary parameter scan results of the THDMa model, an extension of the Standard Model with additional scalar and pseudoscalar fields, highlighting regions relevant for future collider experiments.

Contribution

It revisits the THDMa model by applying current constraints and identifying promising parameter regions for future electron-positron collider investigations.

Findings

Identified viable parameter space regions consistent with current constraints.

Highlighted potential signals for future $e^+e^-$ collider experiments.

Provided a comprehensive overview of the model's phenomenology.

Abstract

We here present preliminary results on a parameter scan of the THDMa, a new physics model that extends the scalar sector of the Standard Model by an additional doublet as well as a pseudoscalar singlet. In the gauge-eigenbasis, the additional pseudoscalar serves as a portal to the dark sector, with a fermionic dark matter candidate. This model is currently one of the standard benchmarks for the LHC experimental collaborations. We apply all current theoretical and experimental constraints and identify regions in the parameter space that might be interesting for an investigation at possible future $e^+e^-$ facilities.