{
  "id": "hep-ph/0512345",
  "version": "v1",
  "published": "2005-12-28T08:38:33.000Z",
  "updated": "2005-12-28T08:38:33.000Z",
  "title": "Fragmentation, NRQCD and Factorization in Heavy Quarkonium Production",
  "authors": [
    "Gouranga C. Nayak",
    "Jian-Wei Qiu",
    "George Sterman"
  ],
  "comment": "3pages Latex, 3eps figures, Talk given by G. C. Nayak at PANIC05 Santa Fe, NM, USA, October 24-28, 2005",
  "doi": "10.1063/1.2220338",
  "categories": [
    "hep-ph",
    "hep-lat",
    "nucl-th"
  ],
  "abstract": "We discuss factorization in heavy quarkonium production in high energy collisions using NRQCD. Infrared divergences at NNLO are not matched by conventional NRQCD matrix elements. However, we show that gauge invariance and factorization require that conventional NRQCD production matrix elements be modified to include Wilson lines or non-abelian gauge links. With this modification NRQCD factorization for heavy quarkonium production is restored at NNLO.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2005-12-28T08:38:33.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "12.39.St",
      "12.39.Jh",
      "12.38.Bx"
    ],
    "keywords": [
      "heavy quarkonium production",
      "conventional nrqcd production matrix elements",
      "fragmentation",
      "conventional nrqcd matrix elements",
      "modification nrqcd factorization"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 3,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 701446
    }
  }
}