{
  "id": "1307.6068",
  "version": "v1",
  "published": "2013-07-23T13:32:30.000Z",
  "updated": "2013-07-23T13:32:30.000Z",
  "title": "Constraints on axion-like particles with H.E.S.S. from observations of PKS 2155-304",
  "authors": [
    "Pierre Brun",
    "Denis Wouters",
    "for the H. E. S. S. collaboration"
  ],
  "comment": "In Proceedings of the 33rd International Cosmic Ray Conference (ICRC2013), Rio de Janeiro (Brazil)",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Axion-like particles are hypothetical new light (sub-eV) bosons predicted in some extensions of the Standard Model of particle physics. In astrophysical environments comprising high-energy gamma rays and turbulent magnetic fields, the existence of axion-like particles can modify the energy spectrum of the gamma rays. This modification would take the form of an irregular behavior of the energy spectrum in a limited energy range. Data from the H.E.S.S. observations of the distant BL Lac PKS 2155-304 are used to derive conservative upper limits on the strength of the axion-like particle coupling to photons. This study gives rise to the first exclusions on axion-like particles from gamma-ray astronomy. The derived constraints apply to both light pseudo-scalar and scalar bosons that couple to the electromagnetic field.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-07-23T13:32:30.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "axion-like particle",
      "observations",
      "constraints",
      "distant bl lac pks",
      "environments comprising high-energy gamma rays"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1244082,
      "adsabs": "2013arXiv1307.6068B"
    }
  }
}