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Cosmic ray antiprotons at high energies
KTH, Centra, Nordic Institute for Theoretical Physics NORDITA. Stockholm Univ, Roslagstullsbacken 23, S-10691 Stockholm, Sweden..
2017 (engelsk)Inngår i: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, nr 2, artikkel-id 048Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Cosmic ray antiprotons provide a powerful tool to probe dark matter annihilations in our galaxy. The sensitivity of this important channel is, however, diluted by sizable uncertainties in the secondary antiproton background. In this work, we improve the calculation of secondary antiproton production with a particular focus on the high energy regime. We employ the most recent collider data and identify a substantial increase of antiproton cross sections with energy. This increase is driven by the violation of Feynman scaling as well as by an enhanced strange hyperon production. The updated antiproton production cross sections are made publicly available for independent use in cosmic ray studies. In addition, we provide the correlation matrix of cross section uncertainties for the AMS-02 experiment. At high energies, the new cross sections improve the compatibility of the AMS-02 data with a pure secondary origin of antiprotons in cosmic rays.

sted, utgiver, år, opplag, sider
Institute of Physics (IOP), 2017. nr 2, artikkel-id 048
Emneord [en]
cosmic ray experiments, cosmic ray theory, cosmic rays detectors, dark matter experiments
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-242323DOI: 10.1088/1475-7516/2017/02/048ISI: 000399455000048Scopus ID: 2-s2.0-85014838062OAI: oai:DiVA.org:kth-242323DiVA, id: diva2:1286601
Merknad

QC 20190207

Tilgjengelig fra: 2019-02-07 Laget: 2019-02-07 Sist oppdatert: 2019-02-07bibliografisk kontrollert

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Winkler, Martin Wolfgang
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