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19 April 2024

» arxiv » 1509.2672

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Perspective of monochromatic gamma-ray line detection with the High Energy cosmic-Radiation Detection (HERD) facility onboard China's Space Station
Xiaoyuan Huang ; Anna S. Lamperstorfer ; Yue-Lin Sming Tsai ; Ming Xu ; Qiang Yuan ; Jin Chang ; Yong-Wei Dong ; Bing-Liang Hu ; Jun-Guang Lü ; Le Wang ; Bo-Bing Wu ; Shuang-Nan Zhang ;
Date:	9 Sep 2015
Abstract:	HERD is the High Energy cosmic-Radiation Detection instrument proposed to operate onboard China’s space station in the 2020s. It is designed to detect energetic cosmic ray nuclei, leptons and photons with a high energy resolution ($sim1\%$ for electrons and photons and $20\%$ for nuclei) and a large geometry factor ($>3, m^2sr$ for electrons and diffuse photons and $>2, m^2sr$ for nuclei). In this work we discuss the capability of HERD to detect monochromatic $gamma$-ray lines, based on simulations of the detector performance. It is shown that HERD will be one of the most sensitive instruments for monochromatic $gamma$-ray searches at energies between $sim10$ to a few hundred GeV. Above hundreds of GeV, Cherenkov telescopes will be more sensitive due to their large effective area. As a specific example, we show that a good portion of the parameter space of a supersymmetric dark matter model can be probed with HERD.
Source:	arXiv, 1509.2672
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