Scalar Dark Matter: Direct vs. Indirect Detection

TL;DR

This paper analyzes a simple scalar dark matter model interacting via the Higgs portal, exploring relic density, detection prospects, and gamma-ray signals, identifying observable regions for future experiments.

Contribution

It provides a comprehensive analysis of scalar dark matter detection prospects, highlighting specific mass ranges where gamma-ray lines could be observed and tested soon.

Findings

Two regions with potential gamma-ray line signals identified

Dark matter mass between 92 and 300 GeV can be tested soon

Relic density and detection predictions are consistent with current constraints

Abstract

We revisit the simplest model for dark matter. In this context the dark matter candidate is a real scalar field which interacts with the Standard Model particles through the Higgs portal. We discuss the relic density constraints as well as the predictions for direct and indirect detection. The final state radiation processes are investigated in order to understand the visibility of the gamma lines from dark matter annihilation. We find two regions where one could observe the gamma lines at gamma-ray telescopes. We point out that the region where the dark matter mass is between 92 and 300 GeV can be tested in the near future at direct and indirect detection experiments.