Fermionic dipole dark matter can match the observed relic abundance and Planck CMB bounds only in a narrow mass-dipole window, with an upper cutoff M16* = 0.44 (dipole ~0.44 x 10^-16 e cm) when electric and magnetic moments are equal.
Therefore, the annihilation effective cross-section expression by the relative thermally averaged speed for the process χχ→γγ is: ⟨σannvrel⟩ =48˜c0m2 GeVD4 16 [ 1 + 1 x ] cm3s−1
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Signatures of Dipolar Dark Matter on Indirect Detection
Fermionic dipole dark matter can match the observed relic abundance and Planck CMB bounds only in a narrow mass-dipole window, with an upper cutoff M16* = 0.44 (dipole ~0.44 x 10^-16 e cm) when electric and magnetic moments are equal.