The 130 GeV gamma-ray line and generic dark matter model building constraints from continuum gamma rays, radio and antiproton data

Abstract

An analysis of the Fermi gamma ray space telescope data has recently revealed a resolved gamma-ray feature close to the galactic center which is consistent with monochromatic photons at an energy of about 130 GeV. If interpreted in terms of dark matter (DM) annihilating into γγ(γZ, γh), this would correspond to a DM particle mass of roughly 130 GeV (145 GeV, 155 GeV). The rate for these loop-suppressed processes, however, is larger than typically expected for thermally produced DM. Correspondingly, one would generically expect even larger tree level production rates of standard model fermions or gauge bosons. Here, we quantify this expectation in a rather model-independent way by relating the tree level and loop amplitudes with the help of the optical theorem. As an application, we consider bounds from continuum gamma rays, radio and antiproton data on the tree level amplitudes and translate them into constraints on the loop amplitudes. We find that, independently of the DM production mechanism, any DM model aiming at explaining the line signal in terms of charged standard model particles running in the loop is in rather strong tension with at least one of these constraints, with the exception of loops dominated by top quarks. We stress that attempts to explain the 130 GeV feature with internal bremsstrahlung do not suffer from such difficulties.

16 pages revtex4; 4 figures. Fixed typos and slightly extended discussion, including constraints for scalar DM case. Matches published version

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Cited by in corpus (22)

• Updated cosmic-ray and radio constraints on light dark matter: Implications for the GeV gamma-ray excess at the Galactic center
• Internal Bremsstrahlung Signature of Real Scalar Dark Matter and Consistency with Thermal Relic Density
• Two-loop radiative seesaw with multicomponent dark matter explaining the possible gamma excess in the Higgs boson decay and at the Fermi LAT
• Sharp Gamma-ray Spectral Features from Scalar Dark Matter Annihilations
• A Critical Reevaluation of Radio Constraints on Annihilating Dark Matter
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• Constraints on dark matter annihilations from diffuse gamma-ray emission in the Galaxy
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• 2HDM Portal Dark Matter: LHC data and the Fermi-LAT 135 GeV Line
• Axino dark matter with R-parity violation and 130 GeV gamma-ray line
• Natural explanation for 130 GeV photon line within vector boson dark matter model
• Updated galactic radio constraints on Dark Matter
• Universal profiles for radio searches of dark matter in dwarf galaxies
• General calculation of the cross section for dark matter annihilations into two photons
• A Clustering Analysis of the Morphology of the 130 GeV Gamma-Ray Feature
• Vector Higgs-portal dark matter and Fermi-LAT gamma ray line
• Gamma-ray line from radiative decay of gravitino dark matter
• Revisiting Discrete Dark Matter Model:θ_{13}\neq0 and ν_{R} Dark Matter
• Synchrotron Emission from Dark Matter in Galactic Subhalos. A Look into the Smith Cloud
• Constraining the Higgs portal with antiprotons
• Magnetic dipole moment of neutral particles from quantum corrections at two-loop order
• 130GeV gamma-ray line through axion conversion