{
  "id": "0710.1878",
  "version": "v1",
  "published": "2007-10-09T21:06:02.000Z",
  "updated": "2007-10-09T21:06:02.000Z",
  "title": "ρD^*D^* vertex from QCD sum rules",
  "authors": [
    "M. E. Bracco",
    "M. Chiapparini",
    "F. S. Navarra",
    "M. Nielsen"
  ],
  "comment": "9 pages, 6 eps figures",
  "journal": "Phys.Lett.B659:559-564,2008",
  "doi": "10.1016/j.physletb.2007.11.066",
  "categories": [
    "hep-ph"
  ],
  "abstract": "We calculate the form factors and the coupling constant in the $\\rho D^* D^*$ vertex in the framework of QCD sum rules. We evaluate the three point correlation functions of the vertex considering both $\\rho$ and $D^*$ mesons off--shell. The form factors obtained are very different but give the same coupling constant: $g_{\\rho D^* D^*} = 6.6 \\pm 0.31$. This number is 50% larger than what we would expect from SU(4) estimates.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2007-10-09T21:06:02.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "11.55.Hx",
      "12.38.Lg",
      "14.40.Lb",
      "14.40.Nd"
    ],
    "keywords": [
      "qcd sum rules",
      "form factors",
      "coupling constant",
      "point correlation functions",
      "mesons off-shell"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Physics Letters B",
      "year": 2008,
      "month": "Jan",
      "volume": 659,
      "number": 3,
      "pages": 559
    },
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 763741,
      "adsabs": "2008PhLB..659..559B"
    }
  }
}