{
  "id": "nucl-th/0401030",
  "version": "v2",
  "published": "2004-01-14T18:49:28.000Z",
  "updated": "2004-04-29T21:16:18.000Z",
  "title": "Consistent analysis of the reaction $γp \\to p η^\\prime$ and $pp \\to ppη^\\prime$",
  "authors": [
    "K. Nakayama",
    "H. Haberzettl"
  ],
  "comment": "minor revision, scheduled to a appear in Phys. Rev. C 69 (May 2004), revtex, 17 pages, 10 figures, 3 tables",
  "journal": "Phys.Rev. C69 (2004) 065212",
  "doi": "10.1103/PhysRevC.69.065212",
  "categories": [
    "nucl-th"
  ],
  "abstract": "The production of $\\eta'$ mesons in the reactions $\\gamma p\\to p\\eta'$ and $pp\\to pp\\eta'$ is described consistently within a relativistic meson exchange model of hadronic interactions. The photoproduction can be described quite well over the entire energy range of available data by considering an $S_{11}$ and a $P_{11}$ resonance, in addition to the $t$-channel mesonic current. The observed angular distribution is due to the interference between the $t$-channel and the nucleon resonance $s$- and $u$-channel contributions. Our analysis yields positions close to 1650 MeV and 1870 MeV for the $S_{11}$ and $P_{11}$ resonances, respectively. We argue that, at present, identifying these states with the known $S_{11}(1650)$ resonance and the missing $P_{11}$ resonance predicted at 1880 MeV, respectively, would be premature. It is found that the nucleonic current is relatively small and that the $NN\\eta^\\prime$ coupling constant cannot be much larger than $g_{NN\\eta^\\prime}=3$. As for the $p p \\to p p \\eta^\\prime$ reaction, different current contributions are constrained by a combined analysis of this and the photoproduction reaction. Difficulties to simultaneously account for the 47-MeV and 144-MeV angular distributions measured by the COSY-11 and DISTO collaborations, respectively, are addressed.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2004-04-29T21:16:18.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.60.Le",
      "25.20.Lj",
      "14.20.Gk",
      "13.75.-n"
    ],
    "keywords": [
      "consistent analysis",
      "angular distribution",
      "analysis yields positions close",
      "relativistic meson exchange model",
      "entire energy range"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. C"
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 17,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 642733
    }
  }
}