Minimal Dirac Fermionic Dark Matter with Nonzero Magnetic Dipole Moment

Understand

A neutral Dirac fermion is supplied as a singlet within the context of the standard model (SM) and is considered as a dark matter (DM) candidate near electroweak scale (10-1000 GeV) with nonzero magnetic dipole moment.

• The Dirac particles have four different types of electromagnetic couplings (four form factors) in general.
• We predict that the candidate mainly interacts with SM particles through magnetic dipole moment (MDM), since MDM conserves the discrete symmetries like parity (P), time reversal (T), and charge conjugation (C) or its combination CP.
• The magnetic dipole moment constrained by the relic density may be as large as 10^(-18)-10^(-17)e cm.