{
  "id": "hep-th/9702098",
  "version": "v1",
  "published": "1997-02-12T13:25:25.000Z",
  "updated": "1997-02-12T13:25:25.000Z",
  "title": "Type I Superstrings without D-branes",
  "authors": [
    "Massimo Bianchi"
  ],
  "comment": "11 pages, latex, no figures; contribution to the Proceedings of the XII Italian Conference on General Relativity and Gravitational Physics, Rome, September 1996",
  "categories": [
    "hep-th"
  ],
  "abstract": "Notwithstanding the central role of D-branes in many recently proposed string dualities, several interesting type I vacua have been found without resorting directly to D-brane technology. In this talk, we analyze a three-generation SO(8)xU(12) chiral type I model with N=1 supersymmetry in D=4. It descends from the type IIB compactification on the Z orbifold and requires only Neumann boundary conditions, i.e. only the ubiquitous D9-branes (pan-branes). We also discuss a large class of 6D type I vacua that display rich patterns of Chan-Paton symmetry breaking/enhancement and various numbers of tensor multiplets. Finally, we briefly address issues raised by the conjectured heterotic - type I duality and by the relation between type I vacua and compactifications of the putative F-theory.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1997-02-12T13:25:25.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "superstrings",
      "type iib compactification",
      "neumann boundary conditions",
      "display rich patterns",
      "chan-paton symmetry breaking/enhancement"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 428671
    }
  }
}