{
  "id": "nucl-th/0511074",
  "version": "v2",
  "published": "2005-11-28T08:33:54.000Z",
  "updated": "2006-07-07T10:09:17.000Z",
  "title": "Radiative neutron capture on a proton at BBN energies",
  "authors": [
    "S. Ando",
    "R. H. Cyburt",
    "S. W. Hong",
    "C. H. Hyun"
  ],
  "comment": "21 pages and 12 eps figures; 6 eps figures and 2 references added, and accepted for publication in Phys. Rev. C",
  "journal": "Phys.Rev. C74 (2006) 025809",
  "doi": "10.1103/PhysRevC.74.025809",
  "categories": [
    "nucl-th",
    "astro-ph",
    "hep-ph",
    "nucl-ex"
  ],
  "abstract": "The total cross section for radiative neutron capture on a proton, $np \\to d \\gamma$, is evaluated at big bang nucleosynthesis (BBN) energies. The electromagnetic transition amplitudes are calculated up to next-to leading order within the framework of pionless effective field theory with dibaryon fields. We also calculate the $d\\gamma\\to np$ cross section and the photon analyzing power for the $d\\vec{\\gamma}\\to np$ process from the amplitudes. The values of low energy constants that appear in the amplitudes are estimated by a Markov Chain Monte Carlo analysis using the relevant low energy experimental data. Our result agrees well with those of other theoretical calculations except for the $np\\to d\\gamma$ cross section at some energies estimated by an R-matrix analysis. We also study the uncertainties in our estimation of the $np\\to d\\gamma$ cross section at relevant BBN energies and find that the estimated cross section is reliable to within $\\sim$1% error.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2006-07-07T10:09:17.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "02.50.Ga",
      "25.40.Lw",
      "02.70.Uu",
      "26.35.+c"
    ],
    "keywords": [
      "radiative neutron capture",
      "cross section",
      "bbn energies",
      "markov chain monte carlo analysis",
      "relevant low energy experimental data"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. C"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 21,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 698944
    }
  }
}