Optimistic CoGeNT analysis

被引：14

作者：

Cline, James M. ^{[1
]}

Liu, Zuowei ^{[1
]}

Xue, Wei ^{[1
]}

机构：

[1] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

来源：

PHYSICAL REVIEW D | 2013年 / 87卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

DARK-MATTER; SEARCH; DAMA;

D O I：

10.1103/PhysRevD.87.015001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Inspired by a recently proposed model of millicharged atomic dark matter (MADM), we analyze several classes of light dark matter models with respect to CoGeNT modulated and unmodulated data, and constraints from CDMS, XENON10 and XENON100. After removing the surface contaminated events from the original CoGeNT data set, we find an acceptable fit to all these data (but with the modulating part of the signal making a statistically small contribution), using somewhat relaxed assumptions about the response of the null experiments at low recoil energies, and postulating an unknown modulating background in the CoGeNT data at recoil energies above 1.5 keVee. We compare the fits of MADM-an example of inelastic magnetic dark matter-to those of standard elastically and inelastically scattering light weakly interacting massive particles. The inelastic dark matter model gives the best fit, with MADM close behind. The dark matter interpretation of the DAMA annual modulation cannot be made compatible with these results however. We find that the inclusion of a tidal debris component in the dark matter phase space distribution improves the fits or helps to relieve tension with XENON constraints. DOI: 10.1103/PhysRevD.87.015001

引用

页数：16

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