Electromagnetic properties of dark matter: Dipole moments and charge form factor

被引：120

作者：

Barger, Vernon ^{[2
]}

Keung, Wai-Yee ^{[3
]}

Marfatia, Danny ^{[1
]}

机构：

[1] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA

[2] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[3] Univ Illinois, Dept Phys, Chicago, IL 60607 USA

来源：

PHYSICS LETTERS B | 2011年 / 696卷 / 1-2期

关键词：

Dark matter; Electric dipole moment; Magnetic dipole moment; Electric charge form factor;

D O I：

10.1016/j.physletb.2010.12.008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A neutral dark matter particle may possess an electric dipole moment (EDM) or a magnetic dipole moment (MDM), so that its scattering with nuclei is governed by electromagnetic interactions. If the moments are associated with relevant operators of dimension-5, they may be detectable in direct search experiments. We calculate complete expressions of the scattering cross sections and the recoil energy spectra for dark matter with these attributes. We also provide useful formulae pertinent to dark matter that interacts via an electric charge form factor (CFF) which is related to the charge radius defined by an effective dimension-6 operator. We show that a 7 GeV dark matter particle with an EDM, MDM or CFF easily reproduces the CoGeNT excess while remaining consistent with null searches. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：74 / 78

页数：5

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