Constraints on heavy decaying dark matter with current gamma-ray measurements

Understand

Among the several strategies for indirect searches of dark matter, one very promising one is to look for the gamma-rays from decaying dark matter.

• Here we use the most up-to-date upper bounds on the gamma-ray flux from $10^5$ to $10^{11}$ GeV, obtained from CASA-MIA, KASCADE, KASCADE-Grande, Pierre Auger Observatory, and Telescope Array.
• We obtain global limits on dark matter lifetime in the range of masses $m_\mathrm{DM}=[10^7-10^{15}]~\mathrm{GeV}$.
• We provide the bounds for a set of decay channels chosen as representatives.