2014/07/31 by Malcolm Fairbairn, Philipp Grothaus
Physics and Astronomy · #Annihilation #Astrophysics #Cosmology #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Electron #Isotropy #Light dark matter #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Positron #Quantum mechanics #Scalar field dark matter #astro-ph.CO #hep-ph
paper · pdf · doi:10.1103/physrevd.90.127302
published as Phys. Rev. D 90, 127302 (2014) · 3 pages, 3 figures, references added, matches published version
openalex publication_date 2014/12/17 · arxiv created 2014/12/18 · arxiv updated 2014/12/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this paper, we show that positron data from AMS seem to rule out the explanation of the ARCADE isotropic radio background excess in terms of self-annihilating dark matter. In earlier works it was found that leptonic annihilation channels of light dark matter provide a good fit to the excess due to synchrotron emission of the final state particles. However, limits on the self-annihilation cross section derived from the positron data of AMS now severely constrain light self-annihilating dark matter and cross sections below that of a thermal relic are already tested for leptonic annihilation channels. Combining these two results, we conclude that an explanation of the excess in the radio background in terms of self-annihilating dark matter is excluded.