{
  "id": "hep-ph/9812458",
  "version": "v1",
  "published": "1998-12-21T15:12:24.000Z",
  "updated": "1998-12-21T15:12:24.000Z",
  "title": "Photoproduction of Heavy Vector Mesons at HERA -- A Testfield for Diffraction",
  "authors": [
    "R. Fiore",
    "L. L. Jenkovszky",
    "F. Paccanoni"
  ],
  "comment": "21 pages, LaTeX, 4 PostScript figures, uses axodraw.sty",
  "journal": "Eur.Phys.J.C10:461-467,1999",
  "doi": "10.1007/s100520050768",
  "categories": [
    "hep-ph"
  ],
  "abstract": "Exclusive diffractive photoproduction of heavy vector mesons (V=phi, J/psi and Upsilon) at HERA is studied in a model employing a dipole Pomeron exchange (P) with an inelastic gamma-P-V vertex. The model is fitted to the data on dsigma/dt, B and elastic sigma for Q^2=0 and beyond the threshold region. The elastic cross sections for both phi and J/psi photoproduction show a moderate increase within the HERA energy region. The flattening of the slope B(s) (little or no shrinkage) for J/psi is not correlated with the slope of the Pomeron trajectory. Estimates for Upsilon photoproduction at HERA are given.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1998-12-21T15:12:24.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "heavy vector mesons",
      "diffraction",
      "dipole pomeron exchange",
      "hera energy region",
      "inelastic gamma-p-v vertex"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 21,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 481321
    }
  }
}