Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission
Francesco Alemanno(Istituto Nazionale di Fisica Nucleare), Q. An(University of Science and Technology of China), P. Azzarello(University of Geneva), Felicia Barbato(Istituto Nazionale di Fisica Nucleare), P. Bernardini(University of Salento), Xiao-Jun Bi(Chinese Academy of Sciences), Mingsheng Cai(University of Science and Technology of China), E. Catanzani(Istituto Nazionale di Fisica Nucleare, Sezione di Perugia), Jin Chang(University of Science and Technology of China), D. Y. Chen(Chinese Academy of Sciences), J. L. Chen(Chinese Academy of Sciences), Z. F. Chen(University of Science and Technology of China), Maxwell Cui(Chinese Academy of Sciences), T. S. Cui(Chinese Academy of Sciences), Yuxin Cui(University of Science and Technology of China), 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), F. de Palma(University of Salento), M. Deliyergiyev(University of Geneva), Margherita Di Santo(University of Salento), Ting Dong(Chinese Academy of Sciences), Z. X. Dong(Chinese Academy of Sciences), 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), Ruirui Fan(Chinese Academy of Sciences), Y. Z. Fan(University of Science and Technology of China), Ke Fang(Chinese Academy of Sciences), 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), 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(Chinese Academy of Sciences), Jian‐Hua Guo(University of Science and Technology of China), Xudong Guo(University of Science and Technology of China), Shuo Han(Chinese Academy of Sciences), Yi-Ming Hu(Chinese Academy of Sciences), G. S. Huang(University of Science and Technology of China), Xiaoyuan Huang(University of Science and Technology of China), Y. Huang(Chinese Academy of Sciences), M. Ionica(Istituto Nazionale di Fisica Nucleare, Sezione di Perugia), Wei Jiang(University of Science and Technology of China), Jie Kong(Chinese Academy of Sciences), Andrii Kotenko(University of Geneva), Dimitrios Kyratzis(Istituto Nazionale di Fisica Nucleare), S. J. Lei(Chinese Academy of Sciences), Shangrong Li(Chinese Academy of Sciences), W. L. Li(Chinese Academy of Sciences), X Li(Chinese Academy of Sciences), Xuanle Li(Chinese Academy of Sciences), Yan Liang(Chinese Academy of Sciences), C. M. Liu(University of Science and Technology of China), H. Liu(Chinese Academy of Sciences), Jiangying Liu(Chinese Academy of Sciences), S. B. Liu(University of Science and Technology of China), Wei Liu(Chinese Academy of Sciences), Ye 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(Chinese Academy of Sciences), Peng-Xiong Ma(Chinese Academy of Sciences), T. Ma(Chinese Academy of Sciences), X. Y.(Chinese Academy of Sciences), G. Marsella(University of Salento), M. N. Mazziotta(Istituto Nazionale di Fisica Nucleare, Sezione di Bari), D. Mo(Chinese Academy of Sciences), X. Y. Niu(Chinese Academy of Sciences), X. Pan(University of Science and Technology of China), A. Parenti(Istituto Nazionale di Fisica Nucleare), Wen-Xi Peng(Chinese Academy of Sciences), X. Y. Peng(Chinese Academy of Sciences), C. Perrina(University of Geneva), Rui Qiao(Chinese Academy of Sciences), J. N. Rao(Chinese Academy of Sciences), Arshia Ruina(University of Geneva), M. M. Salinas(University of Geneva), Guojin Shang(Chinese Academy of Sciences), W. H. Shen(Chinese Academy of Sciences), Zhao-Qiang Shen(University of Science and Technology of China), Z. T. Shen(University of Science and Technology of China), Leandro Silveri(Istituto Nazionale di Fisica Nucleare), J. X. Song(Chinese Academy of Sciences), M. Stolpovskiy(University of Geneva), H. Su(Chinese Academy of Sciences), Meng Su(University of Hong Kong), Ze-Tong Sun(Chinese Academy of Sciences), A. Surdo(Istituto Nazionale di Fisica Nucleare, Sezione di Lecce), Xueyi Teng(Chinese Academy of Sciences), A. Tykhonov(University of Geneva), H. Wang(Chinese Academy of Sciences), Junfeng Wang(Chinese Academy of Sciences), L. G. Wang(Chinese Academy of Sciences), S Wang(University of Science and Technology of China), Xuelian Wang(University of Science and Technology of China), Y Wang(University of Science and Technology of China), Y. F. Wang(University of Science and Technology of China), Y. Z. Wang(University of Science and Technology of China), Z. M. 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), Sha Sha Wu(Chinese Academy of Sciences), X. Wu(University of Geneva), Zi-Qing Xia(Chinese Academy of Sciences), He Xu(Chinese Academy of Sciences), 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(Chinese Academy of Sciences), H. B. Yang(Chinese Academy of Sciences), Peng Yang(Chinese Academy of Sciences), Yaqing Yang(Chinese Academy of Sciences), Huijun Yao(Chinese Academy of Sciences), Y. H. Yu(Chinese Academy of Sciences), Guan-Wen Yuan(University of Science and Technology of China), Qiang Yuan(University of Science and Technology of China), Chuan Yue(Chinese Academy of Sciences), Jing-Jing Zang(Chinese Academy of Sciences), Fan Zhang(Chinese Academy of Sciences), Xiaofeng Zhang(Chinese Academy of Sciences), W. Z. Zhang(Chinese Academy of Sciences), Yu Zhang(University of Science and Technology of China), Yiping 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), Z. Zhang(University of Science and Technology of China), Z. Y. Zhang(University of Science and Technology of China), Chengxin Zhao(University of Science and Technology of China), Hongzhi Zhao(Chinese Academy of Sciences), Xiaofan Zhao(Chinese Academy of Sciences), C. Y. Zhou(Chinese Academy of Sciences), Yan Zhu(Chinese Academy of Sciences)
Cited by 155Open Access
Abstract
The measurement of the energy spectrum of cosmic ray helium nuclei from 70 GeV to 80 TeV using 4.5 years of data recorded by the Dark Matter Particle Explorer (DAMPE) is reported in this work. A hardening of the spectrum is observed at an energy of about 1.3 TeV, similar to previous observations. In addition, a spectral softening at about 34 TeV is revealed for the first time with large statistics and well controlled systematic uncertainties, with an overall significance of 4.3σ. The DAMPE spectral measurements of both cosmic protons and helium nuclei suggest a particle charge dependent softening energy, although with current uncertainties a dependence on the number of nucleons cannot be ruled out.
Related Papers
Geant4—a simulation toolkit
S. Agostinelli, John E. Allison, B. R. Ko et al.|Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment|2003|24.4k
A multidimensional unfolding method based on Bayes' theorem
G. D’Agostini|Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment|1995|1.2k