Constraining WIMP magnetic moment from CDMS II experiment

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.Comment: 7 pages with 5 figures. The definition of old F2 is related to the conventional F2 and two more nuclei are added in Table