{
  "annotation_id": "8f8606fb-e0aa-4d6a-8511-01611d7da607",
  "date_created": "2026-03-02T18:00:22.423000Z",
  "date_modified": "2026-03-02T18:00:22.423000Z",
  "file_hash": "c979dedd883ac13830e225742e97f768d0a8f2357c578be8a0e557613d1b95bf",
  "private": false,
  "record": {
    "abstract": "Conventional theories of nuclear interactions predict a net increase in the\ndistribution of virtual pions in nuclei relative to free nucleons. Analysis of\ndata from several nuclear experiments has led to claims of evidence against\nsuch a pion excess. These conclusions are usually based on a collective theory\n(RPA) of the pions, which may be inadequate. The issue is the energy dependence\nof the nuclear response, which differs for theories with strong NN correlations\nfrom the RPA predictions. In the present paper, information about the energy\ndependence is extracted from sum rules, which are calculated for such a\ncorrelated, noncollective nuclear theory. The results lead to much reduced\nsensitivity of nuclear reactions to the correlations that are responsible for\nthe pion excess. The primary example is $(\\vec p,\\vec n)$ spin transfer, for\nwhich the expected effects are found to be smaller than the experimental\nuncertainties. The analysis has consequences for Deep Inelastic Scattering\n(DIS) experiments as well.",
    "arxiv_id": "nucl-th/9709033",
    "authors": [
      "Daniel S. Koltun"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.57.1210",
    "journal_ref": "Phys.Rev.C57:1210-1217,1998",
    "title": "Pion Excess, Nuclear Correlations, and the Interpretation of ($\\vec p,   \\vec n$) Spin Transfer Experiments",
    "url": "https://arxiv.org/abs/nucl-th/9709033"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "35213867-af17-4376-9645-c64a28d80835",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}