Constraining Decaying Dark Matter with Fermi LAT Gamma-rays

Understand

High energy electrons and positrons from decaying dark matter can produce a significant flux of gamma rays by inverse Compton off low energy photons in the interstellar radiation field.

• This possibility is inevitably related with the dark matter interpretation of the observed PAMELA and FERMI excesses.
• The aim of this paper is providing a simple and universal method to constraint dark matter models which produce electrons and positrons in their decay by using the Fermi LAT gamma-ray observations in the energy range between 0.5 GeV and 300 GeV.
• We provide a set of universal response functions that, once convolved with a specific dark matter model produce the desired constraint.