Dark Matter Programme
Dark Matter Programme
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暗物质计划
DOI：
10.1142/9789813270091_0004
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
H. Zechlin
中科院分区：
文献类型：
--
作者：
E. Moulin;J. Carr;J. Gaskins;M. Doro;C. Farnier;M. Wood;H. Zechlin
到目前为止，暗物质作为宇宙中主要引力质量的存在已经得到了很好的证实，但暗物质的详细性质仍然未知。关于暗物质的性质存在多种假设，对于所讨论的最流行的模型，切伦科夫望远镜阵列(CTA)有一个独特的发现机会。以弱相互作用大质量粒子(WIMP)的形式，暗物质粒子可以自我湮灭，将其巨大的静止质量转化为其他标准模型粒子，包括伽马射线。来自这种湮灭的间接探测为宇宙中暗物质的粒子性质提供了一种独特的测试。对伽马射线的观测为CTA使用的暗物质的“间接”探测提供了探头。在早期宇宙的标准热历史中，湮灭截面有一个自然值--“热截面”，它为以这种方式发现暗物质所需的灵敏度提供了标度。WIMP的特殊模型，如超对称性(SUSY)和额外维度的理论，给出了来自湮灭的伽马射线能谱的预测，这是预测间接搜索灵敏度的关键因素。CTA灵敏度预测的另一个关键因素是搜索…观测到的目标中暗物质的分布
The existence of dark matter as the dominant gravitational mass in the universe is by now well established, but the detailed nature of dark matter is still unknown. Multiple hypotheses endure as to the character of dark matter, and for the most popular models discussed the Cherenkov Telescope Array (CTA) has a unique chance of discovery. In the form of weakly interacting massive particles (WIMPs), dark matter particles can self-annihilate, converting their large rest masses into other Standard Model particles, including gamma rays. Indirect detection from such annihilations provides a unique test of the particle nature of dark matter,in situin the Cosmos. Observations of the gamma rays provide the probe for the “indirect” detection of dark matter employed by CTA. In the standard thermal history of the early universe, the annihilation cross-section has a natural value, the “thermal cross-section”, which provides the scale for the sensitivity needed to discover dark matter in this way. Particular models for WIMPs such as supersymmetry (SUSY) and theories with extra dimensions give predictions for gamma-ray energy spectra from the annihilations which are essential ingredients towards the predictions of the sensitivity of the indirect searches. Another vital ingredient in the CTA sensitivity predictions is the distribution of dark matter in the targets observed for the search…