Spin-dependent WIMPs in DAMA?

被引：56

作者：

Ullio, P ^{[1
]}

Kamionkowski, M ^{[1
]}

Vogel, P ^{[1
]}

机构：

[1] CALTECH, Pasadena, CA 91125 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2001年 / 07期

基金：

美国国家科学基金会;

关键词：

dark matter; supersymmetric standard model;

D O I：

10.1088/1126-6708/2001/07/044

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We investigate whether the annual modulation observed in the DAMA experiment can be due to a weakly-interacting massive particle (WIMP) with an axial-vector (spin-dependent; SD) coupling to nuclei. We evaluate the SD WIMP-proton cross section under the assumption that such scattering accounts for the DAMA modulation, and we do the same for a SD WIMP-neutron cross section. We show that SD WIMP-proton scattering is ruled out in a model-independent fashion by null searches for energetic neutrinos from WIMP annihilation in the Sun, and that SD WIMP-neutron scattering is ruled out for WIMP masses greater than or similar to 20 GeV by the null result with the DAMA Xe detector. A SD WIMP with mass less than or similar to 20 GeV is still compatible, but only if the SD WIMP-neutron interaction is four orders of magnitude greater than the WIMP-proton interaction.

引用

页码：1 / 9

页数：10

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