利用伽马射线研究暗物质

Dark matter research is one of the frontiers of the new physics studies beyond the standard model. Dark matter indirect detection study, especially that based on gamma rays, is of great interest to the physics society. The successful launch of the DAMPE satellite into space brings us new opportunities for the dark matter research with gamma rays. The primary goal of this research proposal is to carry out research projects based on the gamma ray observation by the DAMPE experiment. We will build particle dark matter models to explain the data from various dark matter indirect detection experiments, also the possible gamma ray excess observed by the DAMPE experiment in the near future. We plan to utilize both the energy and the angular distributions of the continuous gamma ray spectrum and the gamma ray line spectrum, observed by the Fermi and DAMPE experiments, to study the particle nature of the dark matter in the Milky Way galaxy. For the recent GeV gamma ray excess from the Galactic Center in the Fermi data, we will use the latest data for further investigations, and also take into account the constraint from the dwarf galaxies. We also plan to investigate the constraints on the dark matter particle from various dark matter experiments which can be further translated into the influence on the gamma rays generated by the dark matter particle. The forthcoming gamma ray data of the DAMPE experiment will surely deepen our understanding of the dark matter particle in the near future.

暗物质的研究是超出标准模型新物理研究的前沿热点之一。暗物质间接探测的研究，尤其是基于伽马射线的研究，最近备受关注。随着我国DAMPE卫星的成功升空，基于伽马射线的暗物质研究将迎来新的机遇。本项目主要围绕DAMPE卫星伽马射线的最新观测数据进行研究。我们计划构造暗物质粒子模型来解释目前已经观测到的暗物质间接探测数据以及DAMPE卫星可能观测到的伽马射线超出。我们计划充分利用Fermi和DAMPE实验观测到的伽马射线连续谱以及线谱的能量信息和角度信息来研究银河系暗物质粒子的物理性质。对于目前观测到银河系中心的GeV伽马射线超出，我们计划利用新的伽马射线数据作进一步研究，同时也将考虑矮星系的约束。我们还将研究各类其它暗物质实验的观测数据对暗物质的约束，进而研究对暗物质产生的伽马射线的影响。借助于DAMPE暗物质卫星，我们期望在不久的将来对暗物质粒子有更深入的了解。

寻找超出标准模型新物理是高能物理研究的一个重要任务。暗物质是超出标准模型的一个明确的新物理现象。在资助期内，本项目开展了多项和暗物质相关的研究工作。1）构建不同的理论模型来解释近来DAMPE卫星实验观测到的高能电子超出现象。我们还分析了HESS实验和Fermi实验观测到的伽马射线数据，发现伽马射线是一个重要的暗物质探测手段，对暗物质模型给出了非常强的限制。2）研究了利用电子对撞机和LHC来对暗物质粒子以及暗区粒子进行观测。3）构建模型解释近来Xenon1T实验观测到的电子反冲事例超出。