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arXiv · 1008.2046

On the Detectability of Galactic Dark Matter Annihilation into Monochromatic Gamma-rays

Zhi-Cheng Tang·Qiang Yuan·Xiao-Jun Bi·Guo-Ming Chen
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Abstract

Monochromatic gamma-rays are thought to be the smoking gun signal for identifying the dark matter annihilation. However, the flux of monochromatic gamma-rays is usually suppressed by the virtual quantum effects since dark matter should be neutral and does not couple with gamma-rays directly. In the work we study the detection strategy of the monochromatic gamma-rays in a future space-based detector. The monochromatic gamma-ray flux is calculated by assuming supersymmetric neutralino as a typical dark matter candidate. We discuss both the detection focusing on the Galactic center and in a scan mode which detects gamma-rays from the whole Galactic halo are compared. The detector performance for the purpose of monochromatic gamma-rays detection, with different energy and angular resolution, field of view, background rejection efficiencies, is carefully studied with both analytical and fast Monte-Carlo method.

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Zhi-Cheng Tang, Qiang Yuan, Xiao-Jun Bi, Guo-Ming Chen. 2010-08-12. On the Detectability of Galactic Dark Matter Annihilation into Monochromatic Gamma-rays. https://doi.org/10.1088/1674-1137/35/8/006

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