{
  "id": "1404.0951",
  "version": "v2",
  "published": "2014-04-03T15:09:45.000Z",
  "updated": "2014-06-04T16:19:29.000Z",
  "title": "Curvaton in large field inflation",
  "authors": [
    "Tomohiro Fujita",
    "Masahiro Kawasaki",
    "Shuichiro Yokoyama"
  ],
  "comment": "16pages, 12figures, ver2: typo corrected, figs. 5-9 and 11 are revised",
  "categories": [
    "astro-ph.CO",
    "gr-qc",
    "hep-ph"
  ],
  "abstract": "We comprehensively explore the quadratic curvaton models in the chaotic inflation. In the light of the BICEP2 result $r \\approx 0.2$, all model parameters and relevant observables are computed. It is found the curvaton field value is constrained into a narrow range, $\\sigma_* = \\mathcal{O}(10^{-2}$-$10^{-1})$ and the running of the spectral index is $n_s' \\gtrsim -10^{-3}$. We show that if the curvaton is added, the models are heavily degenerated on the $n_s$ - $r$ plane. However, introducing a new plane, the degeneracy can be resolved. To distinguish the curvaton models, precise measurements of not only $r$ but also $n_s'$ and the tensor tilt $n_T$ are required.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2014-06-04T16:19:29.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "large field inflation",
      "curvaton field value",
      "quadratic curvaton models",
      "chaotic inflation",
      "model parameters"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/1475-7516/2014/09/015",
      "journal": "Journal of Cosmology and Astro-Particle Physics",
      "year": 2014,
      "month": "Sep",
      "volume": 2014,
      "number": 9,
      "pages": "015"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1288464,
      "adsabs": "2014JCAP...09..015F"
    }
  }
}