Antiproton Flux, Antiproton-to-Proton Flux Ratio, and Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station
AMS Collaboration
刊名PHYSICAL REVIEW LETTERS
2016
卷号117期号:9
DOI10.1103/PhysRevLett.117.091103
文章类型Article
英文摘要A precision measurement by AMS of the antiproton flux and the antiproton-to-proton flux ratio in primary cosmic rays in the absolute rigidity range from 1 to 450 GV is presented based on 3.49 x 10(5) antiproton events and 2.42 x 10(9) proton events. The fluxes and flux ratios of charged elementary particles in cosmic rays are also presented. In the absolute rigidity range similar to 60 to similar to 500 GV, the antiproton (p) over bar, proton p, and positron e(+) fluxes are found to have nearly identical rigidity dependence and the electron e(-) flux exhibits a different rigidity dependence. Below 60 GV, the ((p) over bar /p), ((p) over bar /e(+)), and (p/e(+)) flux ratios each reaches a maximum. From similar to 60 to similar to 500 GV, the ((p) over bar /p), ((p) over bar /e(+)), and (p/e(+)) flux ratios show no rigidity dependence. These are new observations of the properties of elementary particles in the cosmos.
关键词[WOS]ABSORPTION CROSS-SECTIONS ; GEOMAGNETIC REFERENCE FIELD ; DARK-MATTER ; RICH DETECTOR ; ANTI-PROTONS ; AMS-02 TRD ; GEV-C ; POSITRONS ; NUCLEI ; CARBON
语种英语
WOS记录号WOS:000382008900001
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260706
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
作者单位中国科学院高能物理研究所
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AMS Collaboration. Antiproton Flux, Antiproton-to-Proton Flux Ratio, and Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station[J]. PHYSICAL REVIEW LETTERS,2016,117(9).
APA AMS Collaboration.(2016).Antiproton Flux, Antiproton-to-Proton Flux Ratio, and Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station.PHYSICAL REVIEW LETTERS,117(9).
MLA AMS Collaboration."Antiproton Flux, Antiproton-to-Proton Flux Ratio, and Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station".PHYSICAL REVIEW LETTERS 117.9(2016).
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