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Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons

文献类型:期刊论文

作者Cui, T. S.13; Zimmer, S.5; Zhu, Y.13; Zhu, X.3,4; Zhou, Y.1; Zhou, C. Y.13; Zhao, X. F.13; Zhao, H. Y.1; Zhao, H.14; Zhang, Z. Y.3,4
刊名NATURE
出版日期2017-12-07
卷号552页码:63-+
ISSN号0028-0836
DOI10.1038/nature24475
英文摘要High-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.
WOS关键词PARTICLE DARK-MATTER ; SUPERNOVA-REMNANTS ; DAMPE ; PROPAGATION ; CANDIDATES ; SIGNATURE ; ENERGIES ; GALAXY
资助项目strategic priority science and technology projects in space science of the Chinese Academy of Sciences ; National Key R&D Program of China[2016YFA0400200] ; National Basic Research Program of China[2013CB837000] ; National Natural Science Foundation of China[11525313] ; National Natural Science Foundation of China[11622327] ; National Natural Science Foundation of China[U1738206] ; 100 Talents Program of Chinese Academy of Sciences ; Swiss National Science Foundation (SNSF), Switzerland ; National Institute for Nuclear Physics (INFN), Italy
WOS研究方向Science & Technology - Other Topics
语种英语
出版者NATURE PUBLISHING GROUP
WOS记录号WOS:000417560500043
资助机构strategic priority science and technology projects in space science of the Chinese Academy of Sciences ; National Key R&D Program of China ; National Basic Research Program of China ; National Natural Science Foundation of China ; 100 Talents Program of Chinese Academy of Sciences ; Swiss National Science Foundation (SNSF), Switzerland ; National Institute for Nuclear Physics (INFN), Italy
源URL[http://119.78.100.186/handle/113462/47089]  
专题近代物理研究所_实验物理中心
通讯作者Ambrosi, G.
作者单位1.Chinese Acad Sci, Inst Modern Phys, Nanchang Rd 509, Lanzhou 730000, Gansu, Peoples R China
2.Ist Nazl Fis Nucl INFN, Sez Perugia, I-06123 Perugia, Italy
3.Univ Sci & Technol China, State Key Lab Particle Detect & Elect, Hefei 230026, Anhui, Peoples R China
4.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China
5.Univ Geneva, Dept Nucl & Particle Phys, CH-1211 Geneva, Switzerland
6.Univ Salento, Dipartimento Matemat & Fis E De Giorgi, I-73100 Lecce, Italy
7.Ist Nazl Fis Nucl INFN, Sez Lecce, I-73100 Lecce, Italy
8.Univ Perugia, Dipartimento Fis & Geol, I-06123 Perugia, Italy
9.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
10.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
推荐引用方式
GB/T 7714
Cui, T. S.,Zimmer, S.,Zhu, Y.,et al. Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons[J]. NATURE,2017,552:63-+.
APA Cui, T. S..,Zimmer, S..,Zhu, Y..,Zhu, X..,Zhou, Y..,...&Ambrosi, G..(2017).Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons.NATURE,552,63-+.
MLA Cui, T. S.,et al."Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons".NATURE 552(2017):63-+.

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来源:近代物理研究所

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