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.
Electric Dipole Moment of Dirac Fermionic Dark Matter
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abstract
The direct limit of electric dipole moment (EDM) and direct search for dark matter by EDM interaction are considered as including the electromagnetic nuclear form factor, in case that the dark matter candidate is a Dirac particle. The WIMP electric dipole moment constrained by direct searches must be lower than 7*10^(-22)e cm for WIMP mass of 100 GeV to satisfy the current experimental exclusion limits at XENON10 and CDMS II. We also consider the CP violation of EDM and the WIMP discovery by EDM intereaction in the future.
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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.