Current Status of Inert Higgs Dark Matter with Dark Fermions

TL;DR

This paper proposes a simple dark matter model extending the Standard Model with new fermions and scalars, motivated by recent precision measurements and astrophysical anomalies, and discusses its testability in future collider and detection experiments.

Contribution

It introduces a novel dark matter model addressing recent experimental anomalies and analyzes its detectability in upcoming high-energy collider and direct detection experiments.

Findings

Future LHC upgrades and direct detection experiments will only partially probe the model.

High-energy muon colliders could explore the remaining parameter space.

The model connects dark matter with recent muon and W boson measurements.

Abstract

The precision measurements of the muon magnetic moment and the $W$ boson mass have sparked interest in the potential deviations from standard model (SM) predictions. While it may be premature to attribute any excesses in these precision measurements to new physics, they do offer a valuable indication of potential directions for physics beyond the SM. Additionally, the particle nature of dark matter (DM) remains a crucial enigma. Despite the absence of any definitive DM signal in direct detection and collider experiments, the Galactic Center GeV $\gamma$-ray excess and the AMS-02 antiproton ($\overline{p}$) excess could potentially offer hints related to the evidence of DM. Motivated by these observations, we propose a simple DM model that addresses all these issues. This model extends the SM by incorporating singlet and doublet Dirac fermion fields, along with a doublet complex scalar field. For the viable parameter regions in this model, we find that future upgrades of the Large Hadron Collider and DM direct detection experiments can only partially probe them, while future high-energy muon colliders hold promise for exploring the unexplored parameter space.