{
  "id": "1602.07427",
  "version": "v1",
  "published": "2016-02-24T08:00:43.000Z",
  "updated": "2016-02-24T08:00:43.000Z",
  "title": "Constraints on α-attractor inflation and reheating",
  "authors": [
    "Yoshiki Ueno",
    "Kazuhiro Yamamoto"
  ],
  "comment": "16 pages, 6 figures",
  "categories": [
    "astro-ph.CO"
  ],
  "abstract": "We investigate a constraint on reheating followed by alpha-attractor-type inflation (the E-model and T-model) from an observation of the spectral index n_s. When the energy density of the universe is dominated by an energy component with the cosmic equation-of-state parameter w_{re} during reheating, its e-folding number N_{re} and the reheating temperature T_{re} are bounded depending on w_{re}. When the reheating epoch consists of two phases, where the energy density of the universe is dominated by uniform inflaton field oscillations in the first phase and by relativistic non-thermalised particles in the second phase, we find a constraint on the e-folding number of the first oscillation phase, N_{sc}, depending the parameters of the inflaton potential. For the simplest perturbative reheating scenario, we find the lower bound for a coupling constant of inflaton decay in the E-model and T-model depending on the model parameters. We also find a constraint on the $\\alpha$ parameter, \\alpha\\simgt 0.01, for the T-model and E-model when we assume a broad resonance reheating scenario.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-02-24T08:00:43.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "constraint",
      "energy density",
      "uniform inflaton field oscillations",
      "first oscillation phase",
      "broad resonance reheating scenario"
    ],
    "publication": {
      "doi": "10.1103/PhysRevD.93.083524"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2016arXiv160207427U",
      "inspire": 1423269
    }
  }
}