{
  "id": "0903.2466",
  "version": "v1",
  "published": "2009-03-13T19:39:38.000Z",
  "updated": "2009-03-13T19:39:38.000Z",
  "title": "Di-Electrons from Resonances in Nucleon-Nucleon Collisions",
  "authors": [
    "L. P. Kaptari",
    "B. Kampfer"
  ],
  "journal": "Phys.Rev.C80:064003,2009",
  "doi": "10.1103/PhysRevC.80.064003",
  "categories": [
    "nucl-th"
  ],
  "abstract": "The contribution of the low-lying nucleon resonances $P_{33}(1232)$, $P_{11}(1440)$ $D_{13}(1520)$ and $S_{11}(1535)$ to the invariant mass spectra of di-electrons stemming from the exclusive processes $pp\\to pp e^+e^-$ and $pn\\to pn e^+e^-$ is investigated within a fully covariant and gauge invariant diagrammatical approach. We employ, within the one-boson exchange approximation, effective nucleon-meson interactions including the exchange mesons $\\pi$, $\\eta$, $\\sigma$, $\\omega$ and $\\rho$ as well as excitations and radiative decays of the above low-lying nucleon resonances. The total contribution of these resonances is dominant, however, bremsstrahlung processes in $pp$ and, in particular, $pn$ collisions at beam energies of 1 - 2 GeV are still significant in certain phase space regions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-03-13T19:39:38.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "14.20.Gk",
      "13.75.Cs",
      "25.75.Dw",
      "13.30.Ce"
    ],
    "keywords": [
      "nucleon-nucleon collisions",
      "di-electrons",
      "low-lying nucleon resonances",
      "one-boson exchange approximation",
      "phase space regions"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review C",
      "year": 2009,
      "month": "Dec",
      "volume": 80,
      "number": 6,
      "pages": "064003"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 815444,
      "adsabs": "2009PhRvC..80f4003K"
    }
  }
}