{
  "id": "1504.07230",
  "version": "v1",
  "published": "2015-04-27T19:56:27.000Z",
  "updated": "2015-04-27T19:56:27.000Z",
  "title": "Implications for dark matter annihilation from the AMS-02 $\\bar{p}/p$ ratio",
  "authors": [
    "Su-Jie Lin",
    "Xiao-Jun Bi",
    "Peng-Fei Yin",
    "Zhao-Huan Yu"
  ],
  "comment": "15 pages, 4 figures, 3 tables",
  "categories": [
    "hep-ph",
    "astro-ph.HE"
  ],
  "abstract": "The AMS-02 collaboration has just released the cosmic antiproton to proton ratio $\\bar{p}/p$ with a high precision up to $\\sim 450$ GeV. In this work, we calculate the secondary antiprotons generated by cosmic ray interactions with the interstellar medium taking into account the uncertainties from the cosmic ray propagation. The $\\bar{p}/p$ ratio predicted by these processes shows some tension with the AMS-02 data in some regions of propagation parameters, but the excess is not significant. We then try to derive upper bounds on the dark matter annihilation cross section from the $\\bar{p}/p$ data or signal regions favored by the data. It is shown that the constraint derived by the AMS-02 data is similar to that from Fermi-LAT observations of dwarf galaxies. The signal region for dark matter is usually required $m_\\chi \\sim O(10)$ TeV and $\\left<\\sigma v\\right>\\sim\\mathcal{O}(10^{-23})~\\cm^3~\\sec^{-1}$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-04-27T19:56:27.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "dark matter annihilation cross section",
      "implications",
      "signal region",
      "cosmic ray interactions",
      "cosmic ray propagation"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015arXiv150407230L",
      "inspire": 1364863
    }
  }
}