{
  "id": "2305.16393",
  "version": "v1",
  "published": "2023-05-25T18:00:25.000Z",
  "updated": "2023-05-25T18:00:25.000Z",
  "title": "Power Counting to Saturation",
  "authors": [
    "Iain Stewart",
    "Varun Vaidya"
  ],
  "comment": "5 pages, 2 figures",
  "categories": [
    "hep-ph",
    "nucl-th"
  ],
  "abstract": "We present a description of saturation in small x deep inelastic scattering from power counting in a top-down effective theory derived from QCD. A factorization formula isolates the universal physics of the nucleus at leading power in x. The onset of saturation is then understood as a breakdown in the expansion in an emergent power counting parameter, which is defined by the matrix element of a gauge invariant operator. We demonstrate the presence of a novel collinear-soft radiation mode, which clarifies the role played by the medium size in deciding linear/non-linear evolution of the cross section in $\\ln x$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-05-25T18:00:25.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "saturation",
      "novel collinear-soft radiation mode",
      "factorization formula isolates",
      "gauge invariant operator",
      "emergent power counting parameter"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}