Light Magnetic Dark Matter in Direct Detection Searches

TL;DR

This paper explores a fermionic dark matter model with magnetic dipole moments, demonstrating its compatibility with several direct detection experiments and analyzing how long-range interactions influence experimental constraints.

Contribution

It introduces a magnetic dipole moment dark matter candidate that can explain certain experimental signals and provides an analytic framework for understanding long-range interaction effects.

Findings

The candidate can explain DAMA, CoGeNT, and CRESST results.

It remains consistent with CDMS, XENON, and PICASSO bounds.

Long-range interactions significantly alter the experimental allowed regions.

Abstract

We study a fermionic Dark Matter particle carrying magnetic dipole moment and analyze its impact on direct detection experiments. In particular we show that it can accommodate the DAMA, CoGeNT and CRESST experimental results. Assuming conservative bounds, this candidate is shown not to be ruled out by the CDMS, XENON and PICASSO experiments. We offer an analytic understanding of how the long-range interaction modifies the experimental allowed regions, in the cross section versus Dark Matter mass parameter space, with respect to the typically assumed contact interaction. Finally, in the context of a symmetric Dark Matter sector, we determine the associated thermal relic density, and further provide relevant constraints imposed by indirect searches and colliders.