{
  "id": "nucl-th/0304084",
  "version": "v2",
  "published": "2003-04-30T08:51:26.000Z",
  "updated": "2003-06-30T12:29:50.000Z",
  "title": "The 2p-2h electromagnetic response in the quasielastic peak and beyond",
  "authors": [
    "A. De Pace",
    "M. Nardi",
    "W. M. Alberico",
    "T. W. Donnelly",
    "A. Molinari"
  ],
  "comment": "27 pages, 12 figures, revtex4; minor modifications in the discussion of the results, references added",
  "journal": "Nucl.Phys. A726 (2003) 303-326",
  "doi": "10.1016/S0375-9474(03)01625-7",
  "categories": [
    "nucl-th"
  ],
  "abstract": "The contribution to the nuclear transverse response function R_T arising from two particle-two hole (2p-2h) states excited through the action of electromagnetic meson exchange currents (MEC) is computed in a fully relativistic framework. The MEC considered are those carried by the pion and by Delta degrees of freedom, the latter being viewed as a virtual nucleonic resonance. The calculation is performed in the relativistic Fermi gas model in which Lorentz covariance can be maintained. All 2p-2h many-body diagrams containing two pionic lines that contribute to R_T are taken into account and the relative impact of the various components of the MEC on R_T is addressed. The non-relativistic limit of the MEC contributions is also discussed and compared with the relativistic results to explore the role played by relativity in obtaining the 2p-2h nuclear response.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2003-06-30T12:29:50.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "25.30.Rw",
      "24.30.Gd",
      "24.10.Jv"
    ],
    "keywords": [
      "2p-2h electromagnetic response",
      "quasielastic peak",
      "nuclear transverse response function",
      "electromagnetic meson exchange currents",
      "relativistic fermi gas model"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Elsevier",
      "journal": "Nucl. Phys. A"
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 27,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 617908
    }
  }
}