{
  "id": "0902.2761",
  "version": "v3",
  "published": "2009-02-16T19:04:53.000Z",
  "updated": "2013-05-09T23:02:24.000Z",
  "title": "D-instantons and twistors: some exact results",
  "authors": [
    "Sergei Alexandrov"
  ],
  "comment": "32 pages, 3 figures, uses JHEP3.cls; some changes in section 3.3.3; corrected formula for the contact potential",
  "journal": "J.Phys.A42:335402,2009",
  "doi": "10.1088/1751-8113/42/33/335402",
  "categories": [
    "hep-th"
  ],
  "abstract": "We present some results on instanton corrections to the hypermultiplet moduli space in Calabi-Yau compactifications of Type II string theories. Previously, using twistor methods, only a class of D-instantons (D2-instantons wrapping A-cycles) was incorporated exactly and the rest was treated only linearly. We go beyond the linear approximation and give a set of holomorphic functions which, through a known procedure, capture the effect of D-instantons at all orders. Moreover, we show that for a sector where all instanton charges have vanishing symplectic invariant scalar product, the hypermultiplet metric can be computed explicitly.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2013-05-09T23:02:24.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "exact results",
      "d-instantons",
      "vanishing symplectic invariant scalar product",
      "hypermultiplet moduli space",
      "calabi-yau compactifications"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Journal of Physics A Mathematical General",
      "year": 2009,
      "month": "Aug",
      "volume": 42,
      "number": 33,
      "pages": 335402
    },
    "note": {
      "typesetting": "TeX",
      "pages": 32,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 813434,
      "adsabs": "2009JPhA...42G5402A"
    }
  }
}