Snowmass2021 Cosmic Frontier: The landscape of cosmic-ray and high-energy photon probes of particle dark matter

Understand

This white paper discusses the current landscape and prospects for experiments sensitive to particle dark matter processes producing photons and cosmic rays.

• Much of the gamma-ray sky remains unexplored on a level of sensitivity that would enable the discovery of a dark matter signal.
• Currently operating GeV-TeV observatories, such as Fermi-LAT, atmospheric Cherenkov telescopes, and water Cherenkov detector arrays continue to target several promising dark matter-rich environments within and beyond the Galaxy.
• Soon, several new experiments will continue to explore, with increased sensitivity, especially extended targets in the sky.