Minimal Dirac Fermionic Dark Matter with Nonzero Magnetic Dipole Moment

Abstract

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. We show that the elastic scattering is due to a spin-spin interaction for the direct detection, and the candidate with mass near electroweak scale is under experimental limits of the current direct detectors, XENON10 and CDMS II. We also consider the possibility of WIMP detection in near future.

Fig.5 and statements related to it are modified

References in corpus (5)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Gauge Singlet Scalars as Cold Dark Matter
• Limits on spin-dependent WIMP-nucleon cross-sections from the XENON10 experiment
• Little Higgs Dark Matter
• The minimal model of fermionic dark matter

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• Casting a Wide Signal Net with Future Direct Dark Matter Detection Experiments
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• LUX Constraints on Magnetic Dark Matter in the $S\bar{E}\chi$y Model with(out) Naturality
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• Effective field theory analysis of composite higgsino-like and wino-like thermal relic dark matter
• Halo-Independent analysis of direct dark matter detection data for any WIMP interaction
• Signatures of Dipolar Dark Matter on Indirect Detection