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

doi:10.1038/nature24475

IHEP OpenIR > 粒子天体物理中心

	Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons
	Dampe Collaboration
	2017
发表期刊	NATURE (IF:40.137[JCR-2016],43.769[5-Year])
ISSN	0028-0836
EISSN	1476-4687
卷号	552 期号:7683 页码:63-+
文章类型	Article
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.
DOI	10.1038/nature24475
关键词[WOS]	PARTICLE DARK-MATTER ; SUPERNOVA-REMNANTS ; DAMPE ; PROPAGATION ; CANDIDATES ; SIGNATURE ; ENERGIES ; GALAXY
收录类别	SCI ; SCOPUS ; ADS ; INSPIREHEP
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000417560500043
ADS Bibcode	2017Natur.552...63D
ADS URL	https://ui.adsabs.harvard.edu/abs/2017Natur.552...63D
ADS引文	https://ui.adsabs.harvard.edu/abs/2017Natur.552...63D/citations
AXRIV号	1711
INSPIRE ID	1639413
INSPIRE URL	https://inspirehep.net/record/1639413
引用统计	正在获取... 被引频次：294 [INSPIRE] 被引频次：430 [ADS]
文献类型	期刊论文
条目标识符	https://ir.ihep.ac.cn/handle/311005/284682
专题	粒子天体物理中心
作者单位	中国科学院高能物理研究所
第一作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Dampe Collaboration. Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons[J]. NATURE,2017,552(7683):63-+.
APA	Dampe Collaboration.(2017).Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons.NATURE,552(7683),63-+.
MLA	Dampe Collaboration."Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons".NATURE 552.7683(2017):63-+.