{
  "id": "1703.05772",
  "version": "v1",
  "published": "2017-03-16T18:02:42.000Z",
  "updated": "2017-03-16T18:02:42.000Z",
  "title": "Newly-Discovered Anomalies in Galactic Cosmic Rays: Time for Exotic Scenarios?",
  "authors": [
    "Mikhail Malkov"
  ],
  "comment": "Cosmic Rays beyond the Standard Model, San Vito, 2016, http://www.crbtsm.eu/, conference paper",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Recent observations of galactic cosmic rays (CR) in the 1-500 GeV energy range have revealed striking deviations from what deemed \"standard.\" The anomalies cut across hadronic and leptonic CRs. I discuss findings that challenge physical mechanisms long held responsible for the CR production in galactic supernova remnants (SNR). I also consider some new physics of particle acceleration in SNR shocks that is not part of conventional models but may explain the anomalies. However, a possible 20-30\\% excess remains unaccounted for in the $e^{+}/e^{+}$ ratio over the range of a few 100 GeV. If not explained by future models, it suggests an additional source of positrons such as a dark matter decay/annihilation or pulsar contribution. Earlier efforts to explain both the $e^{+}/e^{-}$ and $p$/He anomalies with the \"standard\" models by adjusting the SNR environmental parameters and multiple sources are critically assessed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-03-16T18:02:42.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "galactic cosmic rays",
      "exotic scenarios",
      "newly-discovered anomalies",
      "mechanisms long held responsible",
      "challenge physical mechanisms long held"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}