Constraints on Heavy Decaying Dark Matter from 570 Days of LHAASO Observations | |
Cao, Zhen1,2,3; Aharonian, F.4,5; An, Q.6,7; Axikegu8; Bai, L. X.9; Bai, Y. X.1,3; Bao, Y. W.10; Bastieri, D.11; Bi, X. J.1,2,3; Bi, Y. J.1,3 | |
刊名 | Physical Review Letters |
2022-12-23 | |
卷号 | 129期号:26 |
ISSN号 | 0031-9007 |
DOI | 10.1103/PhysRevLett.129.261103 |
产权排序 | 第24完成单位 |
文献子类 | Journal article (JA) |
英文摘要 | The kilometer square array (KM2A) of the large high altitude air shower observatory (LHAASO) aims at surveying the northern γ-ray sky at energies above 10 TeV with unprecedented sensitivity. γ-ray observations have long been one of the most powerful tools for dark matter searches, as, e.g., high-energy γ 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 γ/hadron separation. We find no excess of dark matter signals, and thus place some of the strongest γ-ray constraints on the lifetime of heavy dark matter particles with mass between 105 and 109 GeV. Our results with LHAASO are robust, and have important implications for dark matter interpretations of the diffuse astrophysical high-energy neutrino emission. © 2022 American Physical Society. |
学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 ; 核科学技术 |
URL标识 | 查看原文 |
资助项目 | N/A |
语种 | 英语 |
出版者 | American Physical Society |
资助机构 | N/A |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/25700] |
专题 | 星系类星体研究组 |
作者单位 | 1.Key Laboratory of Particle Astrophyics and Experimental Physics, Division and Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; 2.University of Chinese Academy of Sciences, Beijing, 100049, China; 3.TIANFU Cosmic Ray Research Center, Sichuan, Chengdu, China; 4.Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, 2 Dublin, Ireland; 5.Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, Heidelberg, 69029, Germany; 6.State Key Laboratory of Particle Detection and Electronics, China; 7.University of Science and Technology of China, Anhui, Hefei, 230026, China; 8.School of Physical Science and Technology, School of Information Science and Technology, Southwest Jiaotong University, Sichuan, Chengdu, 610031, China; 9.College of Physics, Sichuan University, Sichuan, Chengdu, 610065, China; 10.School of Astronomy and Space Science, Nanjing University, Jiangsu, Nanjing, 210023, China; |
推荐引用方式 GB/T 7714 | Cao, Zhen,Aharonian, F.,An, Q.,et al. Constraints on Heavy Decaying Dark Matter from 570 Days of LHAASO Observations[J]. Physical Review Letters,2022,129(26). |
APA | Cao, Zhen.,Aharonian, F..,An, Q..,Axikegu.,Bai, L. X..,...&Wang, H..(2022).Constraints on Heavy Decaying Dark Matter from 570 Days of LHAASO Observations.Physical Review Letters,129(26). |
MLA | Cao, Zhen,et al."Constraints on Heavy Decaying Dark Matter from 570 Days of LHAASO Observations".Physical Review Letters 129.26(2022). |
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