{
  "annotation_id": "f266e50a-e036-4533-a689-114d9382d995",
  "date_created": "2026-03-02T18:00:18.459000Z",
  "date_modified": "2026-03-02T18:00:18.459000Z",
  "file_hash": "c063fe9935b31b62d6d1664f4122dfd6f85985beaf3578d5f1f42337a29bc0db",
  "private": false,
  "record": {
    "abstract": "The particle-hole and Delta -hole excitations are well-known elementary\nexcitation modes for the pion propagator in nuclear matter. But, the excitation\nalso involves antiparticles, namely, nucleon-antinucleon, anti-Delta-nucleon\nand Delta-antinucleon excitations. These are important for high-energy momentum\nas well, and have not been studied before, to our knowledge. In this paper, we\ngive both the formulas and the numerical calculations for the real and the\nimaginary parts of these excitations.",
    "arxiv_id": "nucl-th/9709005",
    "authors": [
      "Liang-gang Liu",
      "Xiang-qian Luo",
      "Qi-fa Zhou",
      "Wei Chen",
      "Masahiro Nakano"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.56.800",
    "journal_ref": "Phys.Rev.C56:800-803,1997",
    "title": "N N bar,Delta bar N, Delta N bar excitation for the pion propagator in   nuclear matter",
    "url": "https://arxiv.org/abs/nucl-th/9709005"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "52abf31d-ec1a-4355-a5a3-77fcdc5ac337",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}