Note on the dark matter explanation of the ARCADE excess and AMS data

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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.

Original languageEnglish
Article number127302
Number of pages5
JournalPhysical Review D (Particles, Fields, Gravitation and Cosmology)
Issue number12
Publication statusPublished - 17 Dec 2014


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