中文摘要：

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.

英文摘要：

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.