Direct detection of boosted dark matter in two component dark matter scenario

TL;DR

This paper explores the potential for detecting boosted light dark matter particles resulting from heavy dark matter annihilation in a two-component dark matter model, emphasizing the capabilities of directional detection experiments like NEWSdm.

Contribution

It introduces a two-component dark matter model with a hidden gauge symmetry and assesses the detectability of boosted dark matter via directional experiments.

Findings

Event rate could reach up to 10 events per year per 5 kg detector

Directional detection experiments can effectively test boosted dark matter signals

Boosted dark matter originates from heavy dark matter annihilation in the Galactic center

Abstract

We investigate the detection of boosted dark matter in a two component dark matter model with the hidden gauge $U(1)_D$ symmetry. The model introduces heavy and light fermionic dark matter components, where the heavy dark matter annihilation in the Galactic center boosts the light dark matter. Directional direct detection experiments, such as NEWSdm, are suitable for testing the boosted scenario by focusing on signals from the Galactic center. We found that the expected event rate could reach up to O(10) events per year per 5 kg of the detector material.