AMS-02 antiprotons: implications for dark matter

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Boudaud, Mathieu^1

LAPTh, Université Savoie Mont Blanc, CNRS, Annecy-le-Vieux

F-74941, France^1

关键词: Dark matter;    Energy dependence;    Helium flux;    Stringent constraints;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/4/042006/pdf
DOI  :  10.1088/1742-6596/718/4/042006

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

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 (with respect to the Med benchmark often used in the literature) starts to emerge. Finally, we provide a first assessment of the room left for exotic components such as Galactic Dark Matter annihilation, deriving new stringent constraints.