On the detectability of Galactic dark matter annihilation into monochromatic gamma-rays

Monochromatic y-rays are thought to be the smoking gun signal for identifying dark matter annihilation. However, the flux of monochromatic y-rays is usually suppressed by virtual quantum effects since dark matter should be neutral and does not couple with y-rays directly. In this work, we study the...

Full description

Saved in:
Bibliographic Details
Published inChinese physics C Vol. 35; no. 8; pp. 725 - 734
Main Author 唐志成 袁强 毕效军 陈国明
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.08.2011
Subjects
Angular resolution
Dark matter
Detectors
Flux
Focusing
Galactic halos
Mathematical analysis
Strategy
伽玛
单色
射线探测
暗物质
湮灭
空间探测器
蒙特卡罗方法
银河系中心
Online AccessGet full text

Cover

More Information
Summary:Monochromatic y-rays are thought to be the smoking gun signal for identifying dark matter annihilation. However, the flux of monochromatic y-rays is usually suppressed by virtual quantum effects since dark matter should be neutral and does not couple with y-rays directly. In this work, we study the detection strategy of the monochromatic y-rays in a future space-based detector. The flux of monochromatic y-rays between 50 GeV and several TeV is calculated by assuming the supersymmetric neutralino as a typical dark matter candidate. The detection both by focusing on the Galactic center and in a scan mode that detects y-rays from the whole Galactic halo are compared. The detector performance for the purpose of monochromatic y-ray detection, with different energy and angular resolution, field of view, and background rejection efficiencies, is carefully studied with both analytical and fast Monte-Carlo methods.
Bibliography:Monochromatic y-rays are thought to be the smoking gun signal for identifying dark matter annihilation. However, the flux of monochromatic y-rays is usually suppressed by virtual quantum effects since dark matter should be neutral and does not couple with y-rays directly. In this work, we study the detection strategy of the monochromatic y-rays in a future space-based detector. The flux of monochromatic y-rays between 50 GeV and several TeV is calculated by assuming the supersymmetric neutralino as a typical dark matter candidate. The detection both by focusing on the Galactic center and in a scan mode that detects y-rays from the whole Galactic halo are compared. The detector performance for the purpose of monochromatic y-ray detection, with different energy and angular resolution, field of view, and background rejection efficiencies, is carefully studied with both analytical and fast Monte-Carlo methods.
11-5641/O4
dark matter, line emission, gamma-ray, detectability
TANG Zhi-Cheng, YUAN Qiang,BI Xiao-Jun, CHEN Guo-Ming（Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China）
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1674-1137
0254-3052
2058-6132
DOI:10.1088/1674-1137/35/8/006