Inelastic dark matter in light of DAMA/LIBRA

被引：165

作者：

Chang, Spencer ^{[1
]}

Kribs, Graham D. ^{[2
,4
]}

Tucker-Smith, David ^{[3
]}

Weiner, Neal ^{[1
]}

机构：

[1] New York Univ, Dept Phys, Ctr Cosmol & Particle Phys, New York, NY 10003 USA

[2] Univ Oregon, Inst Theoret Sci, Eugene, OR 97403 USA

[3] Williams Coll, Dept Phys, Williamstown, MA 01267 USA

[4] Univ Oregon, Dept Phys, Eugene, OR 97403 USA

来源：

PHYSICAL REVIEW D | 2009年 / 79卷 / 04期

基金：

美国国家科学基金会;

关键词：

LIMITS; XENON;

D O I：

10.1103/PhysRevD.79.043513

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Inelastic dark matter, in which weakly interacting massive particle (WIMP)-nucleus scatterings occur through a transition to an excited WIMP state similar to 100 keV above the ground state, provides a compelling explanation of the DAMA annual modulation signal. We demonstrate that the relative sensitivities of various dark matter direct detection experiments are modified such that the DAMA annual modulation signal can be reconciled with the absence of a reported signal at CDMS-Soudan, XENON10, ZEPLIN, CRESST, and KIMS for inelastic WIMPs with masses O(100 GeV). We review the status of these experiments, and make predictions for upcoming ones. In particular, we note that inelastic dark matter leads to highly suppressed signals at low energy, with most events typically occurring between 20 and 45 keV (unquenched) at xenon and iodine experiments, and generally no events at low (similar to 10 keV) energies. Suppressing the background in this high-energy region is essential to testing this scenario. The recent CRESST data suggest seven observed tungsten events, which is consistent with expectations from this model. If the tungsten signal persists at future CRESST runs, it would provide compelling evidence for inelastic dark matter, while its absence should exclude it.

引用

页数：13

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