Publication
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
| dc.contributor.author | AMS collaboration (268 authors) | |
| dc.contributor.author | Arruda, L. | |
| dc.contributor.author | Barao, F. | |
| dc.contributor.author | Nunes, P. | |
| dc.contributor.author | Orcinha, M. | |
| dc.contributor.author | Pereira, R. | |
| dc.date.accessioned | 2019-02-04T11:03:12Z | |
| dc.date.available | 2019-02-04T11:03:12Z | |
| dc.date.issued | 2016-08-26 | |
| dc.date.updated | 2019-02-04T11:03:12Z | |
| dc.description.abstract | 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 3.49×105 antiproton events and 2.42×109 proton events. The fluxes and flux ratios of charged elementary particles in cosmic rays are also presented. In the absolute rigidity range ∼60 to ∼500 GV, the antiproton p¯, 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¯/p), (p¯/e+), and (p/e+) flux ratios each reaches a maximum. From ∼60 to ∼500 GV, the (p¯/p), (p¯/e+), and (p/e+) flux ratios show no rigidity dependence. These are new observations of the properties of elementary particles in the cosmos. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Rev.Lett. 117 (2016) 091103; DOI 10.1103/PhysRevLett.117.091103 | |
| dc.identifier.uri | http://dx.doi.org/10.1103/PhysRevLett.117.091103 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/27174 | |
| dc.language.iso | eng | |
| dc.title | 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 | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |