Two-singlet model for light cold dark matter

被引：31

作者：

Abada, Abdessamad ^{[1
]}

Ghaffor, Djamal ^{[2
]}

Nasri, Salah ^{[3
]}

机构：

[1] Ecole Normale Super, Lab Phys Particules & Phys Stat, Algiers 16050, Algeria

[2] Es Senia Univ, Lab Phys Theor Oran, Oran 31000, Algeria

[3] UAE Univ, Dept Phys, Al Ain, U Arab Emirates

来源：

PHYSICAL REVIEW D | 2011年 / 83卷 / 09期

关键词：

PROBE WMAP OBSERVATIONS;

D O I：

10.1103/PhysRevD.83.095021

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We extend the standard model by adding two gauge-singlet Z(2)-symmetric scalar fields that interact with visible matter only through the Higgs particle. One is a stable dark matter WIMP, and the other one undergoes a spontaneous breaking of the symmetry that opens new channels for the dark matter annihilation, hence lowering the mass of the WIMP. We study the effects of the observed dark matter relic abundance on the WIMP annihilation cross section and find that in most regions of the parameters' space, light dark matter is viable. We also compare the elastic-scattering cross section of our dark matter candidate off a nucleus with existing (CDMSII and XENON100) and projected (SuperCDMS and XENON1T) experimental exclusion bounds. We find that most of the allowed mass range for light dark matter will be probed by the projected sensitivity of the XENON1T experiment.

引用

页数：15

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