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

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dc.contributor.authorZhang SD
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dc.contributor.authorZhang Z
dc.contributor.authorZheng ZM
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dc.contributor.authorZuccon P
dc.contributor.organizationfi=avaruustutkimuslaboratorio|en=Space Research Laboratory|
dc.contributor.organization-code1.2.246.10.2458963.20.47833719389
dc.contributor.organization-code2606702
dc.converis.publication-id17164601
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/17164601
dc.date.accessioned2022-10-28T14:09:46Z
dc.date.available2022-10-28T14:09:46Z
dc.description.abstractA 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.
dc.identifier.eissn1079-7114
dc.identifier.jour-issn0031-9007
dc.identifier.olddbid186637
dc.identifier.oldhandle10024/169731
dc.identifier.urihttps://www.utupub.fi/handle/11111/39162
dc.identifier.urlhttps://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.091103
dc.identifier.urnURN:NBN:fi-fe2021042715614
dc.language.isoen
dc.okm.affiliatedauthorBattarbee, Markus
dc.okm.affiliatedauthorEronen, Timo
dc.okm.affiliatedauthorValtonen, Eino
dc.okm.discipline114 Physical sciencesen_GB
dc.okm.discipline115 Astronomy and space scienceen_GB
dc.okm.discipline114 Fysiikkafi_FI
dc.okm.discipline115 Avaruustieteet ja tähtitiedefi_FI
dc.okm.internationalcopublicationinternational co-publication
dc.okm.internationalityInternational publication
dc.okm.typeA1 ScientificArticle
dc.publisherAMER PHYSICAL SOC
dc.publisher.countryUnited Statesen_GB
dc.publisher.countryYhdysvallat (USA)fi_FI
dc.publisher.country-codeUS
dc.relation.articlenumberARTN 091103
dc.relation.doi10.1103/PhysRevLett.117.091103
dc.relation.ispartofjournalPhysical Review Letters
dc.relation.issue9
dc.relation.volume117
dc.source.identifierhttps://www.utupub.fi/handle/10024/169731
dc.titleAntiproton 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.year.issued2016

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