Measurement of the cosmic ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite
Q. An(University of Science and Technology of China), R. Asfandiyarov(University of Geneva), P. Azzarello(University of Geneva), P. Bernardini(University of Salento), X. J. Bi(Chinese Academy of Sciences), Mingsheng Cai(University of Science and Technology of China), Jin Chang(University of Science and Technology of China), D. Y. Chen(University of Science and Technology of China), H. F. Chen(University of Science and Technology of China), Ji‐Long Chen(Chinese Academy of Sciences), Wei Chen(Chinese Academy of Sciences), M. Y. Cui(Chinese Academy of Sciences), T. S. Cui(Chinese Academy of Sciences), Haoting Dai(University of Science and Technology of China), A. D׳Amone(University of Salento), A. De Benedittis(University of Salento), I. De Mitri(Istituto Nazionale di Fisica Nucleare), Margherita Di Santo(University of Salento), Meng Ding(Chinese Academy of Sciences), T. K. Dong(Chinese Academy of Sciences), Yifan Dong(Chinese Academy of Sciences), Z. X. Dong(National Space Science Center), Giacinto Donvito(Istituto Nazionale di Fisica Nucleare, Sezione di Bari), David Droz(University of Geneva), Jinglai Duan(Chinese Academy of Sciences), K. K. Duan(Chinese Academy of Sciences), D. D’Urso(Istituto Nazionale di Fisica Nucleare, Sezione di Perugia), R. R. Fan(University of Science and Technology of China), Yi-Zhong Fan(University of Science and Technology of China), F. Fang(Chinese Academy of Sciences), C. Q. Feng(University of Science and Technology of China), Lei Feng(Chinese Academy of Sciences), P. Fusco(Istituto Nazionale di Fisica Nucleare, Sezione di Bari), V. Gallo(University of Geneva), Fengxia Gan(University of Science and Technology of China), M. Gao(Chinese Academy of Sciences), F. Gargano(Istituto Nazionale di Fisica Nucleare, Sezione di Bari), Ke Gong(Chinese Academy of Sciences), Yuanlin Gong(Chinese Academy of Sciences), D. Y. Guo(University of Science and Technology of China), Jian‐Hua Guo(University of Science and Technology of China), Xiaolong Guo(University of Science and Technology of China), Shuo Han(University of Science and Technology of China), Yi-Ming Hu(University of Science and Technology of China), G. S. Huang(University of Science and Technology of China), Xiaoyuan Huang(Chinese Academy of Sciences), Y. Y. Huang(Chinese Academy of Sciences), M. Ionica(Chinese Academy of Sciences), Weiman Jiang(University of Science and Technology of China), Xuancheng Jin(University of Science and Technology of China), Jie Kong(Chinese Academy of Sciences), S. J. Lei(Chinese Academy of Sciences), Shaoquan Li(Chinese Academy of Sciences), W. L. Li(National Space Science Center), Xiang Li(Chinese Academy of Sciences), Xiang Li(Chinese Academy of Sciences), Ying Li(Chinese Academy of Sciences), Yun-Feng Liang(Chinese Academy of Sciences), Y. M. Liang(Chinese Academy of Sciences), Neng-Hui Liao(Chinese Academy of Sciences), C. M. Liu(University of Science and Technology of China), H. Liu(Chinese Academy of Sciences), J. Liu(Chinese Academy of Sciences), S. B. Liu(University of Science and Technology of China), Wei Liu(Chinese Academy of Sciences), Yong Liu(Chinese Academy of Sciences), F. Loparco(Istituto Nazionale di Fisica Nucleare, Sezione di Bari), C. N. Luo(University of Science and Technology of China), M. Ma(National Space Science Center), Peng-Xiong Ma(University of Science and Technology of China), S. Y.(University of Science and Technology of China), T. Ma(Chinese Academy of Sciences), X. Y.(National Space Science Center), G. Marsella(University of Salento), M. N. Mazziotta(Istituto Nazionale di Fisica Nucleare, Sezione di Bari), Delin Mo(Chinese Academy of Sciences), X. Y. Niu(Chinese Academy of Sciences), X. Pan(University of Science and Technology of China), Wen-Xi Peng(Chinese Academy of Sciences), X. Y. Peng(Chinese Academy of Sciences), Rui Qiao(Chinese Academy of Sciences), J. N. Rao(National Space Science Center), M. M. Salinas(University of Geneva), Guojin Shang(National Space Science Center), W. H. Shen(National Space Science Center), Zhao-Qiang Shen(University of Science and Technology of China), Zhongtao Shen(University of Science and Technology of China), J. X. Song(National Space Science Center), H. Su(Chinese Academy of Sciences), M. Su(Chinese Academy of Sciences), Z. Sun(Chinese Academy of Sciences), A. Surdo(Istituto Nazionale di Fisica Nucleare, Sezione di Lecce), Xueyi Teng(National Space Science Center), A. Tykhonov(University of Geneva), S. Vitillo(University of Geneva), C. Wang(University of Science and Technology of China), H. Wang(Chinese Academy of Sciences), Haiying Wang(Chinese Academy of Sciences), Jianzhong Wang(Chinese Academy of Sciences), L. G. Wang(National Space Science Center), R. Wang(University of Science and Technology of China), S. Wang(Chinese Academy of Sciences), Xianghua Wang(University of Science and Technology of China), Xiaogang Wang(University of Science and Technology of China), Y. F. Wang(University of Science and Technology of China), Y. P. Wang(University of Science and Technology of China), Yuan-Zhu Wang(University of Science and Technology of China), Zhaomin Wang(Istituto Nazionale di Fisica Nucleare), Da-Ming Wei(University of Science and Technology of China), Jun-Jie Wei(Chinese Academy of Sciences), Yifeng Wei(University of Science and Technology of China), Sicheng Wen(University of Science and Technology of China), Di Wu(Chinese Academy of Sciences), J. F. Wu(University of Science and Technology of China), Libo Wu(University of Science and Technology of China), S. Wu(National Space Science Center), X. Wu(University of Geneva), Kai Xi(Chinese Academy of Sciences), Zi-Qing Xia(University of Science and Technology of China), He Xu(National Space Science Center), Z. H. Xu(University of Science and Technology of China), Z. L. Xu(University of Science and Technology of China), Z. Xu(University of Science and Technology of China), Guofeng Xue(National Space Science Center), H. B. Yang(Chinese Academy of Sciences), Peng Yang(Chinese Academy of Sciences), Yifan Yang(Chinese Academy of Sciences), Z. L. Yang(Chinese Academy of Sciences), Huijun Yao(Chinese Academy of Sciences), Y. H. Yu(Chinese Academy of Sciences), Qiang Yuan(University of Science and Technology of China), Chuan Yue(Chinese Academy of Sciences), Jing-Jing Zang(Chinese Academy of Sciences), Fei Zhang(Chinese Academy of Sciences), J. Y. Zhang(Chinese Academy of Sciences), J. Z. Zhang(Chinese Academy of Sciences), P. F. Zhang(Chinese Academy of Sciences), Shengxia Zhang(Chinese Academy of Sciences), W. Z. Zhang(National Space Science Center), Yan Zhang(University of Science and Technology of China), Yan Zhang(University of Science and Technology of China), Y. L. Zhang(University of Science and Technology of China), Y. P. Zhang(University of Science and Technology of China), Y. Q. Zhang(University of Science and Technology of China), Zhongshi Zhang(University of Science and Technology of China), Z. Y. Zhang(University of Science and Technology of China), Haisheng Zhao(Chinese Academy of Sciences), Hengyu Zhao(Chinese Academy of Sciences), Xiaofan Zhao(National Space Science Center), C. Y. Zhou(National Space Science Center), Yong Zhou(Chinese Academy of Sciences), X. Zhu(University of Science and Technology of China), Yan Zhu(National Space Science Center), S. Zimmer(University of Geneva)
Cited by 273Open Access
Abstract
years of data recorded by the DArk Matter Particle Explorer (DAMPE). This is the first time that an experiment directly measures the cosmic ray protons up to ~100 TeV with high statistics. The measured spectrum confirms the spectral hardening at ~300 GeV found by previous experiments and reveals a softening at ~13.6 TeV, with the spectral index changing from ~2.60 to ~2.85. Our result suggests the existence of a new spectral feature of cosmic rays at energies lower than the so-called knee and sheds new light on the origin of Galactic cosmic rays.
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