Confronting the Galactic Center Gamma Ray Excess With a Light Scalar Dark Matter

Understand

The Fermi Large Area Telescope observed an excess in gamma ray emission spectrum coming from the center of the Milky Way galaxy.

• This data reveals that a light Dark Matter (DM) candidate of mass in the range 31-40 GeV, dominantly decaying into $b\bar b$ final state, can explain the presence of the observed bump in photon energy.
• We try to interpret this observed phenomena by sneutrino DM annihilation into pair of fermions in the Supersymmetric Inverse Seesaw Model (SISM).
• This model can also account for tiny non-zero neutrino masses satisfying existing neutrino oscillation data.