Galacic Gamma-Ray Excess And Relevant Interpretations

Firstly, this paper introduces the phenomenon and the characterization of the Gamma-Ray signal from Galactic Center:The Gamma-Ray signal is approximate spherical symmetry around the Galactic Center. The spectrum of the Gamma-Ray peaks at～1-3 GeV. The morphology of the Gamma-Ray signals can be well fit by annihilation of dark matter particles, that can provide correct relic density. The distribution of dark matter described by a generalized NFW halo profile is also approximate spherical symmetry. The second part will interpret this phenomenon by several models:Z’mediated dark matter model, Secluded WIMPs, two component dark matter model, Non-abelian Dark Matter model, two-Higgs-doublet-portal dark matter model and inert doublet dark matter model.