{
  "id": "hep-th/0507069",
  "version": "v2",
  "published": "2005-07-07T19:09:46.000Z",
  "updated": "2006-04-22T18:47:56.000Z",
  "title": "An index for the Dirac operator on D3 branes with background fluxes",
  "authors": [
    "Eric Bergshoeff",
    "Renata Kallosh",
    "Amir-Kian Kashani-Poor",
    "Dmitri Sorokin",
    "Alessandro Tomasiello"
  ],
  "comment": "Fermion coupling to five-form restored, conclusions of the paper unchanged",
  "journal": "JHEP 0510:102,2005",
  "doi": "10.1088/1126-6708/2005/10/102",
  "categories": [
    "hep-th"
  ],
  "abstract": "We study the problem of instanton generated superpotentials in Calabi-Yau orientifold compactifications directly in type IIB string theory. To this end, we derive the Dirac equation on a Euclidean D3 brane in the presence of background fluxes. We propose an index which governs whether the generation of a superpotential in the effective 4d theory by D3 brane instantons is possible. Applying the formalism to various classes of examples, including the K3 x T^2/Z_2 orientifold, in the absence and presence of fluxes, we show that our results are consistent with conclusions attainable via duality from an M-theory analysis.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2006-04-22T18:47:56.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "background fluxes",
      "dirac operator",
      "euclidean d3 brane",
      "type iib string theory",
      "d3 brane instantons"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "IOP",
      "journal": "Journal of High Energy Physics",
      "year": 2005,
      "month": "Oct",
      "volume": 2005,
      "number": 10,
      "pages": 102
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 686920,
      "adsabs": "2005JHEP...10..102B"
    }
  }
}