Implications of the Fermi-LAT Pass 8 Galactic Center Excess on Supersymmetric Dark Matter

Understand

The Fermi Collaboration has recently updated their analysis of gamma rays from the center of the Galaxy.

• They reconfirm the presence of an unexplained emission feature which is most prominent in the region of $1-10$ GeV, known as the Galactic Center GeV excess (GCE).
• Although the GCE is now firmly detected, an interpretation of this emission as a signal of self-annihilating dark matter (DM) particles is not unambiguously possible due to systematic effects in the gamma-ray modeling estimated in the Galactic Plane.
• In this paper we build a covariance matrix, collecting different systematic uncertainties investigated in the Fermi Collaboration's paper that affect the GCE spectrum.