Semi-annihilating dark matter in cosmological structures yields a boosted flux that can rival or exceed the galactic signal, and structure formation requires ⟨σ₂→₁v⟩ ≤ 4.2×10⁻¹⁹ (mχ/1 GeV) cm³/s.
Constraints on dark matter annihilation from CMB obser- vations before Planck
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Cosmological signals of dark matter semi-annihilation
Semi-annihilating dark matter in cosmological structures yields a boosted flux that can rival or exceed the galactic signal, and structure formation requires ⟨σ₂→₁v⟩ ≤ 4.2×10⁻¹⁹ (mχ/1 GeV) cm³/s.