Current and Upcoming Sensitivities to Dark Matter in Gamma-Ray Observatories

Dark matter particle candidates naturally emerge at the weak scale in extensions to the Standard Model of particle physics. Our analysis finds that current constraints from the all-sky exposure of the Fermi Telescope exclude the canonical expected cross section for weakly-interacting massive particle dark matter, in agreement with complementary results from other groups. At higher photon energies, corresponding to higher dark matter particle masses, I show that the High Energy Spectroscopic System (HESS) observatory and High-Altitude Water Cerenkov (HAWC) observatory provide unprecedented sensitivities to extended models of dark matter at the TeV and higher mass scales.