{
  "id": "1207.1103",
  "version": "v1",
  "published": "2012-07-04T20:00:05.000Z",
  "updated": "2012-07-04T20:00:05.000Z",
  "title": "Superpotential de-sequestering in string models",
  "authors": [
    "Marcus Berg",
    "Joseph P. Conlon",
    "David Marsh",
    "Lukas T. Witkowski"
  ],
  "comment": "37 pages + appendices, 8 figures",
  "journal": "JHEP 1302:018,2013",
  "doi": "10.1007/JHEP02(2013)018",
  "categories": [
    "hep-th"
  ],
  "abstract": "Non-perturbative superpotential cross-couplings between visible sector matter and K\\\"ahler moduli can lead to significant flavour-changing neutral currents in compactifications of type IIB string theory. Here, we compute corrections to Yukawa couplings in orbifold models with chiral matter localised on D3-branes and non-perturbative effects on distant D7-branes. By evaluating a threshold correction to the D7-brane gauge coupling, we determine conditions under which the non-perturbative corrections to the Yukawa couplings appear. The flavour structure of the induced Yukawa coupling generically fails to be aligned with the tree-flavour structure. We check our results by also evaluating a correlation function of two D7-brane gauginos and a D3-brane Yukawa coupling. Finally, by calculating a string amplitude between n hidden scalars and visible matter we show how non-vanishing vacuum expectation values of distant D7-brane scalars, if present, may correct visible Yukawa couplings with a flavour structure that differs from the tree-level flavour structure.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-07-04T20:00:05.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "string models",
      "superpotential de-sequestering",
      "yukawa coupling generically fails",
      "correct visible yukawa couplings",
      "non-vanishing vacuum expectation values"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Springer",
      "journal": "Journal of High Energy Physics",
      "year": 2013,
      "month": "Feb",
      "volume": 2013,
      "pages": 18
    },
    "note": {
      "typesetting": "TeX",
      "pages": 37,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1121399,
      "adsabs": "2013JHEP...02..018B"
    }
  }
}