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

TANG Zhi-Cheng; YUAN Qiang; BI Xiao-Jun; CHEN Guo-Ming

doi:10.1088/1674-1137/35/8/006

Chinese Physics C> 2011, Vol. 35> Issue(8) : 725-734 DOI: 10.1088/1674-1137/35/8/006

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

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Abstract：
Monochromatic γ-rays are thought to be the smoking gun signal for identifying dark matter annihilation. However, the flux of monochromatic γ-rays is usually suppressed by virtual quantum effects since dark matter should be neutral and does not couple with γ-rays directly. In this work, we study the detection strategy of the monochromatic γ-rays in a future space-based detector. The flux of monochromatic γ-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 γ-rays from the whole Galactic halo are compared. The detector performance for the purpose of monochromatic γ-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.

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TANG Zhi-Cheng, YUAN Qiang, BI Xiao-Jun and CHEN Guo-Ming. On the detectability of Galactic dark matter annihilation into monochromatic gamma-rays[J]. Chinese Physics C, 2011, 35(8): 725-734. doi: 10.1088/1674-1137/35/8/006

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Received: 2010-11-05
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 2010-11-05

Accepted Date: 1900-01-01

Available Online: 2011-08-05

Abstract: Monochromatic γ-rays are thought to be the smoking gun signal for identifying dark matter annihilation. However, the flux of monochromatic γ-rays is usually suppressed by virtual quantum effects since dark matter should be neutral and does not couple with γ-rays directly. In this work, we study the detection strategy of the monochromatic γ-rays in a future space-based detector. The flux of monochromatic γ-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 γ-rays from the whole Galactic halo are compared. The detector performance for the purpose of monochromatic γ-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.

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

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