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Journal Articles Journal of Cosmology and Astroparticle Physics Year : 2015

AMS-02 antiprotons, at last! Secondary astrophysical component and immediate implications for Dark Matter

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Abstract

Using the updated proton and helium fluxes just released by the AMS-02 experiment we reevaluate the secondary astrophysical antiproton to proton ratio and its uncertainties, and compare it with the ratio preliminarly reported by AMS-02. We find no unambiguous evidence for a significant excess with respect to expectations. Yet, some preference for a flatter energy dependence of the diffusion coefficient starts to emerge. Also, we provide a first assessment of the room left for exotic components such as Galactic Dark Matter annihilation or decay, deriving new stringent constraints.

Dates and versions

cea-01221167 , version 1 (27-10-2015)

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Gaëlle Giesen, Mathieu Boudaud, Yoann Genolini, Vivian Poulin, Marco Cirelli, et al.. AMS-02 antiprotons, at last! Secondary astrophysical component and immediate implications for Dark Matter. Journal of Cosmology and Astroparticle Physics, 2015, 2015 (09), ⟨10.1088/1475-7516/2015/09/023⟩. ⟨cea-01221167⟩
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