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

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.
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https://hal-cea.archives-ouvertes.fr/cea-01221167
Contributor : Emmanuelle de Laborderie <>
Submitted on : Tuesday, October 27, 2015 - 3:05:36 PM
Last modification on : Thursday, July 2, 2020 - 12:32:05 PM

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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, Institute of Physics (IOP), 2015, 2015 (09), ⟨10.1088/1475-7516/2015/09/023⟩. ⟨cea-01221167⟩

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