{
  "id": "0709.0413",
  "version": "v2",
  "published": "2007-09-04T13:23:52.000Z",
  "updated": "2008-05-28T14:50:16.000Z",
  "title": "Effects of Lightest Neutrino Mass in Leptogenesis",
  "authors": [
    "E. Molinaro",
    "S. T. Petcov",
    "T. Shindou",
    "Y. Takanishi"
  ],
  "comment": "28 pages, 6 figures; published version",
  "journal": "Nucl.Phys.B797:93-116,2008",
  "doi": "10.1016/j.nuclphysb.2007.12.033",
  "categories": [
    "hep-ph"
  ],
  "abstract": "The effects of the lightest neutrino mass in ``flavoured'' leptogenesis are investigated in the case when the CP-violation necessary for the generation of the baryon asymmetry of the Universe is due exclusively to the Dirac and/or Majorana phases in the neutrino mixing matrix U. The type I see-saw scenario with three heavy right-handed Majorana neutrinos having hierarchical spectrum is considered. The ``orthogonal'' parametrisation of the matrix of neutrino Yukawa couplings, which involves a complex orthogonal matrix R, is employed. Results for light neutrino mass spectrum with normal and inverted ordering (hierarchy) are obtained. It is shown, in particular, that if the matrix R is real and CP-conserving and the lightest neutrino mass m_3 in the case of inverted hierarchical spectrum lies the interval 5 \\times 10^{-4} eV < m_3 < 7 \\times 10^{-3} eV, the predicted baryon asymmetry can be larger by a factor of \\sim 100 than the asymmetry corresponding to negligible m_3 \\cong 0. As consequence, we can have successful thermal leptogenesis for 5 \\times 10^{-6} eV < m_3 < 5 \\times 10^{-2} eV even if R is real and the only source of CP-violation in leptogenesis is the Majorana and/or Dirac phase(s) in U.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2008-05-28T14:50:16.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "14.60.Pq",
      "14.60.St",
      "98.80.Cq"
    ],
    "keywords": [
      "lightest neutrino mass",
      "leptogenesis",
      "light neutrino mass spectrum",
      "heavy right-handed majorana neutrinos",
      "hierarchical spectrum"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Elsevier",
      "journal": "Nuclear Physics B",
      "year": 2008,
      "month": "Jul",
      "volume": 797,
      "number": "1-2",
      "pages": 93
    },
    "note": {
      "typesetting": "TeX",
      "pages": 28,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 759779,
      "adsabs": "2008NuPhB.797...93M"
    }
  }
}