Class of Higgs-portal Dark Matter models in the light of gamma-ray excess from Galactic center

Abstract

Recently the study of anomalous gamma-ray emission in the regions surrounding the galactic center has drawn a lot of attention as it points out that the excess of $\sim 1-3$ GeV gamma-ray in the low latitude is consistent with the emission expected from annihilating dark matter. The best-fit to the gamma-ray spectrum corresponds to dark matter (DM) candidate having mass in the range $\sim 31-40$ GeV annihilating into $b\bar{b}$-pair with cross-section $⟨\sigma v⟩=(1.4-2.0)\times 10^{-26}{\text{cm}}^3{\text{sec}}^{-1}$. We have shown that the Higgs-portal dark matter models in presence of scalar resonance (in the annihilation channel) are well-suited for explaining these phenomena. In addition, the parameter space of these models also satisfy constraints from the LHC Higgs searches, relic abundance and direct detection experiments. We also comment on real singlet scalar Higgs-portal DM model which is found to be incompatible with the recent analysis.

v3: Matches published version. Figures 2 & 3 are modified. 6 Pages. 4 Figures. v2 : References added

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Cited by in corpus (13)

• A Tale of Tails: Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics
• WIMPs at the Galactic Center
• NMSSM Interpretation of the Galactic Center Excess
• Updated cosmic-ray and radio constraints on light dark matter: Implications for the GeV gamma-ray excess at the Galactic center
• Galactic center $\gamma$-ray excess in hidden sector DM models with dark gauge symmetries: local $Z_3$ symmetry as an example
• Freeze-in Production of Sterile Neutrino Dark Matter in U(1)${}_{\mathrm{B}-\mathrm{L}}$ Model
• Search for Gamma-ray Emission from Dark Matter Annihilation in the Large Magellanic Cloud with the Fermi Large Area Telescope
• Nonthermal Two Component Dark Matter Model for Fermi-LAT $\gamma$-ray excess and 3.55 keV X-ray Line
• Towards a Supersymmetric Description of the Fermi Galactic Center Excess
• Galactic Centre GeV Photons from Dark Technicolor
• Testing Type II Radiative Seesaw Model: from Dark Matter Detection to LHC Signatures
• Interpreting the galactic center gamma-ray excess in the NMSSM
• Dark matter properties implied by gamma ray interstellar emission models