Constraining WIMP magnetic moment from CDMS II experiment

TL;DR

This paper investigates how a magnetic moment in nearly degenerate dark matter particles could enhance detection signals at low energies, analyzing implications for recent CDMS II experimental results.

Contribution

It introduces a model where dark matter with a magnetic moment enhances direct detection prospects, especially in low Q^2 regions, and discusses its relevance to CDMS II findings.

Findings

Magnetic moments can significantly increase detection cross-sections at low Q^2.

Implications suggest potential explanations for CDMS II signals.

Enhanced detection sensitivity for nearly degenerate dark matter candidates.

Abstract

We consider a degenerate or a nearly degenerate dark matter sector where a sizable magnetic moment of an almost Dirac type neutral dark matter candidate N is anticipated. Then, due to soft photon exchange, the cross-section in direct detection of N can be enhanced at low Q^2 region. We discuss the implication of this type of models in view of the recent CDMS II report.