Constraints on Heavy Decaying Dark Matter from 570 Days of LHAASO Observations

作者：zhen cao, F. Aharonian, Q. An, Axikegu, Lixin Bai, Y. X. Bai, Y. W. Bao, D. Bastieri, Xiao-Jun Bi, Y. J. Bi, J. T. Cai, Zhe Cao, Jin Chang, J. F. Chang, E. S. Chen, Liang Chen, Liang Chen, Long Chen, M. J. Chen, M. L. Chen, Q. H. Chen, Shaw H. Chen, S. Z. Chen, T. L. Chen, Yu Chen, H. L. Cheng, Ning Cheng, Yaodong Cheng, S. W. Cui, Xiaohong Cui, Y. D. Cui, B. D′Ettorre Piazzoli, B. Z. Dai, H. L. Dai, Z. G. Dai, Danzengluobu Danzengluobu, D. della Volpe, K. K. Duan, J. H. Fan, Y. Z. Fan, Z. X. Fan, J. Fang, Kun Fang, C. F. Feng, Lei Feng, S. H. Feng, X. T. Feng, Y. L. Feng, Bo Gao, C. D. Gao, L. Q. Gao, Qi Gao, W. Gao, W. K. Gao, M. M. Ge, Li‐Sheng Geng, G. Gong, Q. B. Gou, M. H. Gu, Fulai Guo, J. G. Guo, Xu Guo, Yi-Qing Guo, Y. Y. Guo, Yunping Han, H. H. He, H. N. He, S. L. He, X. B. He, Y. He, M. Heller, Y. K. Hor, C. Hou, Xianglin Hou, H. B. Hu, Q. Hu, S. Hu, S. C. Hu, X. Hu, D. Huang, Wenhao Huang, X. T. Huang, X. Y. Huang, Yiming Huang, Zhi-Qiu Huang, X. L. Ji, H.Y Jia, K. Jia, K. Jiang, Z. J. Jiang, Ming Jin, M. M. Kang, T. Ke, D. Kuleshov, K. Levochkin, Bing Li, Cheng Li, Cong Li, Faping Li, H. B. Li, Hancheng Li, H. Y. Li, Jianping Li, Jian Li, Jie Li, K. Li, Wenwen Li, X. R. Li, Xin Li, Xin Li, Y. Z. Li, Zhe Li, Z. Li, En-Wei Liang, Liang Yu, S. J. Lin, Bingyi Liu, Congzhan Liu, Desheng Liu, H. Liu, Haowen Liu, Jian Liu, J. L. Liu, J. S. Liu, J. Y. Liu, M. Y. Liu, R. Y. Liu, S. M. Liu, W. Liu, Yueqiang Liu, Y. N. Liu, W. J. Long, R. Lu, Q. Luo, H.K Lv, B. Q., L. L., Xinhua Ma, J. R. Mao, A. Masood, Z. Min, W. Mitthumsiri, Y. C. Nan, Z. W. Ou, Bingyan Pang, P. Pattarakijwanich, Z. Y. Pei, M. Qi, Yuning Qi, B. Q. Qiao, J. J. Qin, D. Ruffolo, A. Sáiz, C. Y. Shao, Lijing Shao, O. Shchegolev, X. D. Sheng, Jian Shi, H. C. Song, Yu. V. Stenkin, V. I. Stepanov, Yang Su, Q. N. Sun, X. N. Sun, Z. B. Sun, P. H. T. Tam, Z. B. Tang, Wei Tian, B. D. Wang, C. Wang, H. G. Wang, H. G. Wang, J. C. Wang, J. S. Wang, L. P. Wang, L. Y. Wang, R. Wang, R. N. Wang, W. Wang, X. G. Wang, X. Y. Wang, Yuwei Wang, Y.D Wang, Yujia Wang, Y. P. Wang, Z.H. Wang, Z. X. Wang, Z. Wang, Z. Wang, D. M. Wei, Jun-Jie Wei, Yong Wei, Tao Wen, C. Y. Wu, H. R. Wu, Sha Sha Wu, Xue-Feng Wu, Yuping Wu, Shao-Qiang Xi, Jun Xia, Jun-Qing Xia, G. M. Xiang, D. X. Xiao, G. Xiao, G. G. Xin, Y. L. Xin, Y. Xing, Z. Xiong, D. L. Xu, Renxin Xu, L. Xue, Dahai Yan, Jun Yan, C. W. Yang, Fang Yang, H. W. Yang, Junyou Yang, Lili Yang, M. J. Yang, Ruizhi Yang, S. B. Yang, Yuhua Yao, Z. G. Yao, Y. M. Ye, L. Q. Yin, N. Yin, X. H. You, Z. Y. You, Y.H. Yu, Qiang Yuan, H. Yue, Houdun Zeng, T. X. Zeng, W. Zeng, Zhaoliang Zeng, M. Zha, X. X. Zhai, B. B. Zhang, F. Zhang, H. M. Zhang, H. Y. Zhang, Jiajia Zhang, L. X. Zhang, Li Zhang, Lu Zhang, P. F. Zhang, Peirong Zhang, R. Zhang, S. B. Zhang, S. R. Zhang, Shoushan Zhang, Xiao Zhang, X. P. Zhang, Y. F. Zhang, Y. L. Zhang, Yi Zhang, Yong Zhang, Bing Zhao, Jie Zhao, Lei Zhao, Lei Zhao, Shunsheng Zhao, F. Zheng, Y. Zheng, Bo Zhou, H. Zhou, J. N. Zhou, Ping Zhou, Rong Zhou, X. X. Zhou, C. G. Zhu, F. R. Zhu, H. Zhu, Kai Zhu, X. Zuo, Shin’ichiro Ando, Marco Chianese, Damiano F. G. Fiorillo, Gennaro Miele, Kenny C. Y. Ng · 发表于：Physical Review Letters · 年份：2022 · DOI：10.1103/physrevlett.129.261103 · 被引用次数：39 · 研究领域：Astrophysics and Cosmic Phenomena、Dark Matter and Cosmic Phenomena、Particle physics theoretical and experimental studies

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 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.