Toward a consistent picture for CRESST, CoGeNT, and DAMA

被引：84

作者：

Kelso, Chris ^{[1
,2
]}

Hooper, Dan ^{[1
,3
]}

Buckley, Matthew R. ^{[1
]}

机构：

[1] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA

[2] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[3] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW D | 2012年 / 85卷 / 04期

关键词：

ABSOLUTE SKY BRIGHTNESS; DARK-MATTER; NUCLEAR RECOILS; VELOCITY; CALIBRATION;

D O I：

10.1103/PhysRevD.85.043515

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Three dark matter direct detection experiments (DAMA/LIBRA, CoGeNT, and CRESST-II) have each reported signals which are not consistent with known backgrounds, but resemble that predicted for a dark matter particle with a mass of roughly similar to 10 GeV and an elastic scattering cross section with nucleons of similar to 10(-41)-10(-40) cm(2). In this article, we compare the signals of these experiments and discuss whether they can be explained by a single species of dark matter particle, without conflicting with the constraints of other experiments. We find that the spectrum of events reported by CoGeNT and CRESST-II are consistent with each other and with the constraints from CDMS-II, although some tension with xenon-based experiments remains. Similarly, the modulation signals reported by DAMA/LIBRA and CoGeNT appear to be compatible, although the corresponding amplitude of the observed modulations are a factor of at least a few higher than would be naively expected, based on the event spectra reported by CoGeNT and CRESST-II. This apparent discrepancy could potentially be resolved if tidal streams or other non-Maxwellian structures are present in the local distribution of dark matter.

引用

页数：11

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