{
  "id": "1812.03369",
  "version": "v1",
  "published": "2018-12-08T19:04:49.000Z",
  "updated": "2018-12-08T19:04:49.000Z",
  "title": "String amplitudes from field-theory amplitudes and vice versa",
  "authors": [
    "Song He",
    "Fei Teng",
    "Yong Zhang"
  ],
  "comment": "11 pages, 2 figures",
  "categories": [
    "hep-th"
  ],
  "abstract": "We present an integration-by-parts reduction of any massless tree-level string correlator to an equivalence class of logarithmic functions, which can be used to define a field-theory amplitude via a Cachazo-He-Yuan (CHY) formula. The string amplitude is then shown to be the double copy of the field-theory one and a special disk/sphere integral. The construction is generic as it applies to any correlator that is a rational function of correct SL(2) weight. By applying the reduction to open bosonic/heterotic strings, we get a closed-form CHY integrand for the $(DF)^2+\\text{YM}+\\phi^3$ theory.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-12-08T19:04:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "field-theory amplitude",
      "string amplitude",
      "vice versa",
      "special disk/sphere integral",
      "open bosonic/heterotic strings"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}