Spin dependence of dark matter scattering

被引：42

作者：

Barger, Vernon ^{[1
,2
]}

Keung, Wai-Yee ^{[3
]}

Shaughnessy, Gabe ^{[1
]}

机构：

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

[2] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA

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

来源：

PHYSICAL REVIEW D | 2008年 / 78卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.78.056007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

New experiments designed to discover a weakly interacting dark matter (DM) particle via spin dependent scattering can distinguish models of electroweak symmetry breaking. The plane of spin dependent versus spin-independent DM scattering cross sections is a powerful model diagnostic. We detail representative predictions of the minimal supergravity (mSUGRA) singlet extended standard model and minimal supersymmetric standard model, a new Dirac neutrino, littlest Higgs with T-parity (LHT), and minimal universal extra dimensions (mUED) models. Of these models, the nearly minimal supersymmetric standard model (nMSSM) has the largest spin dependent (SD) cross section. It has a very light neutralino which would give lower energy nuclear recoils. The focus point region of mSUGRA, mUED, and the right-handed neutrino also predict a very large SD cross section and predict a large signal of high energy neutrinos in the IceCube experiment from annihilations of dark matter in the Sun. We also describe a model-independent treatment of the scattering of DM particles of different intrinsic spins.

引用

页数：20

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