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Journal Article

Constraints on dark matter annihilation from AMS-02 results

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons30706

Kopp,  Joachim
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

Fulltext (public)

1304.1184.pdf
(Preprint), 4KB

Supplementary Material (public)
There is no public supplementary material available
Citation

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


Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-7BF6-8
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.