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A precision search for WIMPs with charged cosmic rays
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Stockholm University, Sweden.
2018 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 1, article id 055Article in journal (Refereed) Published
Abstract [en]

AMS-02 has reached the sensitivity to probe canonical thermal WIMPs by their annihilation into antiprotons. Due to the high precision of the data, uncertainties in the astrophysical background have become the most limiting factor for indirect dark matter detection. In this work we systematically quantify and where possible reduce uncertainties in the antiproton background. We constrain the propagation of charged cosmic rays through the combination of antiproton, BBC and positron data. Cross section uncertainties are determined from a wide collection of accelerator data and are for the first time ever fully taken into account. This allows us to robustly constrain even subdominant dark matter signals through their spectral properties. For a standard NFW dark matter profile we are able to exclude thermal WIMPs with masses up to 570 GeV which annihilate into bottom quarks. While we confirm a reported excess compatible with dark matter of mass around 80 GeV, its local (global) significance only reaches 2.2 sigma (1.1 sigma) in our analysis.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2018. no 1, article id 055
Keywords [en]
cosmic ray experiments, cosmic ray theory, dark matter experiments, dark matter theory
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-223289DOI: 10.1088/1475-7516/2018/01/055ISI: 000423857100002Scopus ID: 2-s2.0-85041808355OAI: oai:DiVA.org:kth-223289DiVA, id: diva2:1183827
Note

QC 20180219

Available from: 2018-02-19 Created: 2018-02-19 Last updated: 2018-02-19Bibliographically approved

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Winkler, Martin Wolfgang
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