{
  "id": "1203.4943",
  "version": "v1",
  "published": "2012-03-22T10:02:22.000Z",
  "updated": "2012-03-22T10:02:22.000Z",
  "title": "Stochastic Background of Gravitational Waves from Fermions",
  "authors": [
    "Kari Enqvist",
    "Daniel G. Figueroa",
    "Tuukka Meriniemi"
  ],
  "comment": "4 pages, 1 figure, submitted to PRL",
  "categories": [
    "astro-ph.CO",
    "gr-qc",
    "hep-ph",
    "hep-th"
  ],
  "abstract": "Preheating and other particle production phenomena in the early Universe can give rise to high- energy out-of-equilibrium fermions with an anisotropic stress. We develop a formalism to calculate the spectrum of gravitational waves due to fermions, and apply it to a variety of scenarios after inflation. We pay particular attention to regularization issues. We show that fermion production sources a stochastic background of gravitational waves with a significant amplitude, but we find that typical frequencies of this new background are not within the presently accessible direct detec- tion range. However, small-coupling scenarios might still produce a signal observable by planned detectors, and thus open a new window into the physics of the very early Universe.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-03-22T10:02:22.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "04.30.-w",
      "98.80.Cq"
    ],
    "keywords": [
      "gravitational waves",
      "stochastic background",
      "energy out-of-equilibrium fermions",
      "fermion production sources",
      "early universe"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevD.86.061301",
      "journal": "Physical Review D",
      "year": 2012,
      "month": "Sep",
      "volume": 86,
      "number": 6,
      "pages": "061301"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1094554,
      "adsabs": "2012PhRvD..86f1301E"
    }
  }
}