Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons
Ambrosi, G.1; An, Q.2,3; Asfandiyarov, R.4; Azzarello, P.4; Bernardini, P.5,6; Bertucci, B.1,7; Cai, M. S.8,9; Chang, J.8,9; Chen, D. Y.8,10; Chen, H. F.2,3; Chen, J. L.11; Chen, W.8,10; Cui, M. Y.8; Cui, T. S.12; D'Amone, A.5,6; De Benedittis, A.5,6; De Mitri, I.5,6; Di Santo, M.; Dong, J. N.2,3; Dong, T. K.8; Dong, Y. F.13; Dong, Z. X.12; Donvito, G.14; Droz, D.4; Duan, K. K.8,10; Duan, J. L.11; Duranti, M.1,7; D'Urso, D.1,15; Fan, R. R.13; Fan, Y. Z.8,9; Fang, F.11; Feng, C. Q.2,3; Feng, L.8; Fusco, P.14,16; Gallo, V.4; Gan, F. J.2,3; Gao, M.13; Gao, S. S.2,3; Gargano, F.14; Garrappa, S.1,7; Gong, K.13; Gong, Y. Z.8; Guo, D. Y.13; Guo, J. H.8; Hu, Y. M.8; Huang, G. S.2,3; Huang, Y. Y.8; Ionica, M.1; Jiang, D.2,3; Jiang, W.8,9; Jin, X.2,3; Kong, J.11; Lei, S. J.8; Li, S.8,10; Li, X.8; Li, W. L.12; Li, Y.11; Liang, Y. F.8,10; Liang, Y. M.12; Liao, N. H.8; Liu, H.8; Liu, J.11; Liu, S. B.2,3; Liu, W. Q.11; Liu, Y.8; Loparco, F.14,16; Ma, M.12; Ma, P. X.8,9; Ma, S. Y.2,3; Ma, T.8; Ma, X. Q.12; Ma, X. Y.12; Marsella, G.5,6; Mazziotta, M. N.14; Mo, D.11; Niu, X. Y.11; Peng, X. Y.8; Peng, W. X.13; Qiao, R.13; Rao, J. N.12; Salinas, M. M.4; Shang, G. Z.12; Shen, W. H.12; Shen, Z. Q.8,10; Shen, Z. T.2,3; Song, J. X.12; Su, H.11; Su, M.8,17,18; Sun, Z. Y.11; Surdo, A.; Teng, X. J.12; Tian, X. B.12; Tykhonov, A.4; Vagelli, V.1,7; Vitillo, S.4; Wang, C.2,3; Wang, H.12; Wang, H. Y.13; Wang, J. Z.13; Wang, L. G.12; Wang, Q.2,3; Wang, S.8,10; Wang, X. H.11; Wang, X. L.2,3; Wang, Y. F.2,3; Wang, Y. P.8,10; Wang, Y. Z.8,10; Wen, S. C.8,10; Wang, Z. M.11; Wei, D. M.8,9; Wei, J. J.8; Wei, Y. F.2,3; Wu, D.13; Wu, J.8,9; Wu, L. B.2,3; Wu, S. S.12; Wu, X.4; Xi, K.11; Xia, Z. Q.8,9; Xin, Y. L.8; Xu, H. T.12; Xu, Z. L.8,10; Xu, Z. Z.2,3; Xue, G. F.12; Yang, H. B.11; Yang, P.11; Yang, Y. Q.11; Yang, Z. L.11; Yao, H. J.11; Yu, Y. H.11; Yuan, Q.8,9; Yue, C.8,10; Zang, J. J.8; Zhang, C.8; Zhang, D. L.2,3; Zhang, F.13; Zhang, J. B.2,3; Zhang, J. Y.13; Zhang, J. Z.11; Zhang, L.8,10; Zhang, P. F.8; Zhang, S. X.11; Zhang, W. Z.12; Zhang, Y.8,10; Zhang, Y. J.11; Zhang, Y. Q.8,10; Zhang, Y. L.2,3; Zhang, Y. P.11; Zhang, Z.8; Zhang, Z. Y.2,3; Zhao, H.13; Zhao, H. Y.11; Zhao, X. F.12; Zhou, C. Y.12; Zhou, Y.11; Zhu, X.2,3; Zhu, Y.12; Zimmer, S.4
Source PublicationNATURE
Corresponding AuthorAmbrosi, G.()
AbstractHigh-energy cosmic-ray electrons and positrons (CREs), which lose energy quickly during their propagation, provide a probe of Galactic high-energy processes(1-7) and may enable the observation of phenomena such as dark-matter particle annihilation or decay(8-10). The CRE spectrum has been measured directly up to approximately 2 teraelectronvolts in previous balloon-or space-borne experiments(11-16), and indirectly up to approximately 5 teraelectronvolts using ground-based Cherenkov gamma-ray telescope arrays(17,18). Evidence for a spectral break in the teraelectronvolt energy range has been provided by indirect measurements(17,18), although the results were qualified by sizeable systematic uncertainties. Here we report a direct measurement of CREs in the energy range 25 gigaelectronvolts to 4.6 teraelectronvolts by the Dark Matter Particle Explorer (DAMPE)(19) with unprecedentedly high energy resolution and low background. The largest part of the spectrum can be well fitted by a 'smoothly broken power-law' model rather than a single power-law model. The direct detection of a spectral break at about 0.9 teraelectronvolts confirms the evidence found by previous indirect measurements(17,18), clarifies the behaviour of the CRE spectrum at energies above 1 teraelectronvolt and sheds light on the physical origin of the sub-teraelectronvolt CREs.
Indexed BySCI
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000417560500043
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Document Type期刊论文
Corresponding AuthorAmbrosi, G.
Affiliation1.Ist Nazl Fis Nucl INFN, Sez Perugia, I-06123 Perugia, Italy
2.Univ Sci & Technol China, State Key Lab Particle Detect & Elect, Hefei 230026, Anhui, Peoples R China
3.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China
4.Univ Geneva, Dept Nucl & Particle Phys, CH-1211 Geneva, Switzerland
5.Univ Salento, Dipartimento Matemat & Fis E De Giorgi, I-73100 Lecce, Italy
6.Ist Nazl Fis Nucl INFN, Sez Lecce, I-73100 Lecce, Italy
7.Univ Perugia, Dipartimento Fis & Geol, I-06123 Perugia, Italy
8.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
9.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
10.Univ Chinese Acad Sci, Yuquan Rd 19, Beijing 100049, Peoples R China
11.Chinese Acad Sci, Inst Modern Phys, Nanchang Rd 509, Lanzhou 730000, Gansu, Peoples R China
12.Chinese Acad Sci, Natl Space Sci Ctr, Nanertiao 1, Beijing 100190, Peoples R China
13.Chinese Acad Sci, Inst High Energy Phys, YuquanLu 19B, Beijing 100049, Peoples R China
14.Ist Nazl Fis Nucl INFN, Sez Bari, I-70125 Bari, Italy
15.ASI Space Sci Data Ctr SSDC, I-00133 Rome, Italy
16.Univ Politecn Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy
17.Univ Hong Kong, Dept Phys, Pok Fu Lam, Hong Kong, Peoples R China
18.Univ Hong Kong, Lab Space Res, Pok Fu Lam, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Ambrosi, G.,An, Q.,Asfandiyarov, R.,et al. Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons[J]. NATURE,2017,552(7683):63-+.
APA Ambrosi, G..,An, Q..,Asfandiyarov, R..,Azzarello, P..,Bernardini, P..,...&Zimmer, S..(2017).Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons.NATURE,552(7683),63-+.
MLA Ambrosi, G.,et al."Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons".NATURE 552.7683(2017):63-+.
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