Cosmic ray protons scattering off dark matter produce the Galactic Center gamma-ray excess through inelastic up-scattering followed by decay or direct elastic 2-to-3 photon production.
Totani, JCAP11, 080 (2025), arXiv:2507.07209 [astro-ph.HE]
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Electroweak doublet dark matter with Higgs-portal interactions accounts for the Galactic halo gamma-ray excess via gauge boson annihilation and allows inelastic scattering with ~100 keV splitting.
citing papers explorer
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Producing the GeV Galactic Center Excess via Cosmic Ray-Dark Matter Scattering
Cosmic ray protons scattering off dark matter produce the Galactic Center gamma-ray excess through inelastic up-scattering followed by decay or direct elastic 2-to-3 photon production.
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Electroweak Doublet Dark Matter for a Galactic Halo Gamma-Ray Excess
Electroweak doublet dark matter with Higgs-portal interactions accounts for the Galactic halo gamma-ray excess via gauge boson annihilation and allows inelastic scattering with ~100 keV splitting.