Photon signal from non-interacting scalar dark matter annihilation

One proposal to search for Dark Matter is to look for photon signals which originates from DM annihilation. This is usually referred to as indirect detection experiment. In the case of Non-Interacting Scalar Dark Matter, there are no electromagnetic, strong, and weak interactions. Thus, the DM only interacts gravitationally. In our model, we determine the NISDM annihilation into a virtual graviton which subsequently creates a pair of Higgs bosons. The Higgs boson then suddenly decays into two photons. The line of sight integral is considered as a signifcant efect of the DM halos density profle. The total cross-section, thermally averaged cross-section and photon signal are fnally calculated and illustrated. (paper)