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  Constraints on dark matter annihilation from AMS-02 results

Kopp, J. (2013). Constraints on dark matter annihilation from AMS-02 results. Physical Review D, 88(7): 076013. doi:10.1103/PhysRevD.88.076013.

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1304.1184.pdf (Preprint), 4KB
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Kopp, Joachim1, Author           
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1Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society, ou_904549              

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Free keywords: High Energy Physics - Phenomenology, hep-ph
 Abstract: We use recently released data on the positron-to-electron ratio in cosmic rays from the AMS-02 experiment to constrain dark matter annihilation in the Milky Way. Due to the yet unexplained positron excess, limits are generally weaker than those obtained using other probes, especially gamma rays. This also means that explaining the positron excess in terms of dark matter annihilation is difficult. Only if very conservative assumptions on the dark matter distribution in the Galactic Center region are adopted, it may be possible to accommodate dark matter annihilating to leptons with a cross section above 10-24cm3/sec. We comment on several theoretical mechanisms to explain such large annihilation cross sections.

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 Dates: 2013-10-24
 Publication Status: Published online
 Pages: 6 pages, 2 figures, v2: improved treatment of astrophysical uncertainties, improved discussion, matches published version
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 Rev. Type: Peer
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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : Published for the American Physical Society by the American Institute of Physics
Pages: - Volume / Issue: 88 (7) Sequence Number: 076013 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258