{
  "id": "nucl-th/9609047",
  "version": "v2",
  "published": "1996-09-21T14:02:13.000Z",
  "updated": "1997-02-11T09:42:45.000Z",
  "title": "Electroproduction of the Roper resonance and the constituent quark model",
  "authors": [
    "F. Cardarelli",
    "E. Pace",
    "G. Salme'",
    "S. Simula"
  ],
  "comment": "revised version to appear in Phys. Lett. B",
  "journal": "Phys.Lett. B397 (1997) 13-19",
  "doi": "10.1016/S0370-2693(97)00149-4",
  "categories": [
    "nucl-th",
    "hep-ph"
  ],
  "abstract": "A parameter-free evaluation of the $N - P_{11}(1440)$ electromagnetic transition form factors is performed within a light-front constituent quark model, using for the first time the eigenfunctions of a mass operator which generates a large amount of configuration mixing in baryon wave functions. A one-body electromagnetic current, which includes the phenomenological constituent quark form factors already determined from an analysis of pion and nucleon experimental data, is adopted. For $Q^2$ up to few $(GeV/c)^2$, at variance with the enhancement found in the elastic channel, the effect of configuration mixing results in a significant suppression of the calculated helicity amplitudes with respect to both relativistic and non-relativistic calculations, based on a simple gaussian-like ansatz for the baryon wave functions.",
  "revisions": [
    {
      "version": "v2",
      "updated": "1997-02-11T09:42:45.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.60.Rj",
      "13.40.Gp",
      "12.39.Ki",
      "12.39.Pn"
    ],
    "keywords": [
      "roper resonance",
      "baryon wave functions",
      "electroproduction",
      "phenomenological constituent quark form factors",
      "electromagnetic transition form factors"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Physics Letters B",
      "year": 1997,
      "month": "Feb",
      "volume": 397,
      "pages": 13
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 423595,
      "adsabs": "1997PhLB..397...13C"
    }
  }
}