AMS-02 antiprotons, at last! Secondary astrophysical component and immediate implications for Dark Matter
High Energy Astrophysical Phenomena
2015-09-30 v3 High Energy Physics - Phenomenology
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.
Keywords
Cite
@article{arxiv.1504.04276,
title = {AMS-02 antiprotons, at last! Secondary astrophysical component and immediate implications for Dark Matter},
author = {Gaëlle Giesen and Mathieu Boudaud and Yoann Genolini and Vivian Poulin and Marco Cirelli and Pierre Salati and Pasquale D. Serpico},
journal= {arXiv preprint arXiv:1504.04276},
year = {2015}
}
Comments
12 pages, 5 figures; Comments and clarifications added (including an appendix), matches version published on JCAP