论文标题
从Lhaaso观察的570天开始，对重腐烂的暗物质的限制
Constraints on heavy decaying dark matter from 570 days of LHAASO observations
论文作者
论文摘要
大型高海拔空气淋浴天文台（LHAASO）的公里平方阵列〜（KM2A）旨在以前所未有的灵敏度在10 TEV以上的Energies北部伽马射线天空进行调查。长期以来，伽玛射线观测一直是深色物质搜索最有力的工具之一，例如，高能伽马射线可以通过沉重的暗物质颗粒的衰减产生。在这封信中，我们使用LHAASO-KM2A进行了第一个暗物质分析，使用1/2-KM2A的前340〜天数和3/4-KM2A的数据的230〜天。伽玛/强子分离后，使用了几个感兴趣的区域来搜索信号并说明残留的宇宙射线背景。我们发现没有过多的暗物质信号，因此将一些最强的伽马射线约束放置在重物质量介于10^5到10^9〜GEV之间的寿命上。我们对Lhaaso的结果是稳健的，并且对弥漫性天体高能中微子发射的暗物质解释具有重要意义。
The Kilometer Square Array~(KM2A) of the Large High Altitude Air Shower Observatory (LHAASO) aims at surveying the northern gamma-ray sky at energies above 10 TeV with unprecedented sensitivity. Gamma-ray observations have long been one of the most powerful tools for dark matter searches, as e.g., high-energy gamma-rays could be produced by the decays of heavy dark matter particles. In this letter, we present the first dark matter analysis with LHAASO-KM2A, using the first 340~days of data from 1/2-KM2A and 230~days of data from 3/4-KM2A. Several regions of interest are used to search for a signal and account for the residual cosmic-ray background after gamma/hadron separation. We find no excess of dark matter signals, and thus place some of the strongest gamma-ray constraints on the lifetime of heavy dark matter particles with mass between 10^5 and 10^9~GeV. Our results with LHAASO are robust, and have important implications for dark matter interpretations of the diffuse astrophysical high-energy neutrino emission.
