{
  "id": "1107.0320",
  "version": "v2",
  "published": "2011-07-01T20:00:10.000Z",
  "updated": "2011-07-22T15:37:34.000Z",
  "title": "Green-Schwarz Mechanism in Heterotic (2,0) Gauged Linear Sigma Models: Torsion and NS5 Branes",
  "authors": [
    "Michael Blaszczyk",
    "Stefan Groot Nibbelink",
    "Fabian Ruehle"
  ],
  "comment": "20 pages, sign corrected, orbifold discussion added, examples extended, references added",
  "journal": "JHEP 1108:083,2011",
  "doi": "10.1007/JHEP08(2011)083",
  "categories": [
    "hep-th"
  ],
  "abstract": "Heterotic string compactifications can be conveniently described in the language of (2,0) gauged linear sigma models (GLSMs). Such models allow for Fayet-Iliopoulos (FI)-terms, which can be interpreted as Kahler parameters and axions on the target space geometry. We show that field dependent non-gauge invariant FI-terms lead to a Green-Schwarz-like mechanism on the worldsheet which can be used to cancel worldsheet anomalies. However, given that these FI-terms are constrained by quantization conditions due to worldsheet gauge instantons, the anomaly conditions turn out to be still rather constraining. Field dependent non-gauge invariant FI-terms result in non-Kahler, i.e. torsional, target spaces in general. When FI-terms involve logarithmic terms, the GLSM seems to describe the heterotic string in the presence of Neveu-Schwarz (NS)5 branes. In particular, when the gauge bundle overcloses the Bianchi identities, the GLSM describes a decompactified target space geometry due to anti-NS5 branes.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2011-07-22T15:37:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "gauged linear sigma models",
      "field dependent non-gauge invariant fi-terms",
      "ns5 branes",
      "non-gauge invariant fi-terms result",
      "green-schwarz mechanism"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Springer",
      "journal": "Journal of High Energy Physics",
      "year": 2011,
      "month": "Aug",
      "volume": 2011,
      "pages": 83
    },
    "note": {
      "typesetting": "TeX",
      "pages": 20,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 916910,
      "adsabs": "2011JHEP...08..083B"
    }
  }
}