{
  "id": "nucl-th/9304001",
  "version": "v1",
  "published": "1993-04-01T15:10:18.000Z",
  "updated": "1993-04-01T15:10:18.000Z",
  "title": "Nambu-Jona-Lasinio Models Beyond the Mean Field Approximation",
  "authors": [
    "P. Domitrovich",
    "D. Bückers",
    "H. Müther"
  ],
  "comment": "17 pages",
  "journal": "Phys.Rev.C48:413-422,1993",
  "doi": "10.1103/PhysRevC.48.413",
  "categories": [
    "nucl-th"
  ],
  "abstract": "Inspired by the model of Nambu and Jona-Lasinio, various Lagrangians are considered for a system of interacting quarks. Employing standard techniques of many-body theory, the scalar part of the quark self-energy is calculated including terms up to second-order in the interaction. Results obtained for the single-particle Green's function are compared with those which only account for the mean-field or Hartree-Fock term in the self-energy. Depending on the explicit form of the Lagrangian, the second-order contributions range between 4 and 90 percent of the leading Hartree-Fock term. This leads to a considerable momentum dependence of the self-energy and the effective mass of the quarks.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1993-04-01T15:10:18.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "mean field approximation",
      "nambu-jona-lasinio models",
      "hartree-fock term",
      "single-particle greens function",
      "second-order contributions range"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. C"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 17,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 356037
    }
  }
}