{
  "id": "0907.2869",
  "version": "v1",
  "published": "2009-07-16T15:48:13.000Z",
  "updated": "2009-07-16T15:48:13.000Z",
  "title": "Large U_{e3} and Tri-bimaximal Mixing",
  "authors": [
    "Srubabati Goswami",
    "Serguey Petcov",
    "Shamayita Ray",
    "Werner Rodejohann"
  ],
  "comment": "20 pages, 9 figures",
  "journal": "Phys.Rev.D80:053013, 2009",
  "doi": "10.1103/PhysRevD.80.053013",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "We investigate in a model-independent way to what extent one can perturb tri-bimaximal mixing in order to generate a sizable value of |U_{e3}|, while at the same time keeping solar neutrino mixing near its measured value, which is close to sin^2 theta_{12} = 1/3. Three straightforward breaking mechanisms to generate |U_{e3}| of about 0.1 are considered. For charged lepton corrections, the suppression of a sizable contribution to sin^2 theta_{12} can be achieved if CP violation in neutrino oscillations is almost maximal. Generation of the indicated value of |U_{e3}| of about 0.1 through renormalization group corrections requires the neutrinos to be quasi-degenerate in mass. The consistency with the allowed range of sin^2 theta_{12} together with large running of |U_{e3}| forces one of the Majorana phases to be close to pi. This implies large cancellations in the effective Majorana mass governing neutrino-less double beta, constraining it to lie near its minimum allowed value of m_0 cos 2 theta_{12}, where m_0 is greater than about 0.1 eV. Finally, explicit breaking of the neutrino mass matrix in the inverted hierarchical and quasi-degenerate neutrino mass spectrum cases is similarly correlated with the effective Majorana mass, although to a lesser extent. The implied values for the atmospheric neutrino mixing angle theta_{23} are given in all cases.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-07-16T15:48:13.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "14.60.Pq",
      "14.60.St",
      "12.60.-i"
    ],
    "keywords": [
      "tri-bimaximal mixing",
      "keeping solar neutrino mixing",
      "majorana mass governing neutrino-less",
      "quasi-degenerate neutrino mass spectrum cases",
      "effective majorana mass"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review D",
      "year": 2009,
      "month": "Sep",
      "volume": 80,
      "number": 5,
      "pages": "053013"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 20,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 825912,
      "adsabs": "2009PhRvD..80e3013G"
    }
  }
}