The $\textit{Fermi}$-LAT gamma-ray excess at the Galactic Center in the singlet-doublet fermion dark matter model

Understand

The singlet-doublet fermion dark matter model (SDFDM) provides a good DM candidate as well as the possibility of generating neutrino masses radiatively.

• The search and identification of DM requires the combined effort of both indirect and direct DM detection experiments in addition to the LHC.
• Remarkably, an excess of GeV gamma rays from the Galactic Center (GCE) has been measured with the \textit{Fermi} Large Area Telescope (LAT) which appears to be robust with respect to changes in the diffuse galactic background modeling.
• Although several astrophysical explanations have been proposed, DM remains a simple and well motivated alternative.