{
  "annotation_id": "4b08c2e2-0d21-47ca-b4d6-2af974fc7d13",
  "date_created": "2026-03-02T18:00:11.979000Z",
  "date_modified": "2026-03-02T18:00:11.979000Z",
  "file_hash": "73dcf1b1aaf95de8e5817606808035df5a53f45fede5b9abb69cedec2c7c4e0f",
  "private": false,
  "record": {
    "abstract": "The effective masses and sizes of N(939), $\\Delta(1232)$ and N(1440) in\nnuclear medium are calculated for a model in which quarks are subjected to a\nconfinement force quenched by the scalar part of nuclear interactions. At the\nnuclear matter density, the nucleon swells by 50\\% relative to the free\nnucleon. The masses of $\\Delta(1232)$ and N(1440) decrease in nuclear medium\nmore than the nucleon, so that the pion requires less energy to excite them in\nnuclear medium than it does for a free nucleon.",
    "arxiv_id": "nucl-th/9308017",
    "authors": [
      "Hiroko Ichie",
      "Arata Hatashigaki",
      "Akira Suzuki",
      "Masahiro Kimura"
    ],
    "categories": [
      "nucl-th"
    ],
    "title": "Effective Masses and Sizes of N(939), $\\Delta\\!\\!\\mbox{\\boldmath(1232)}$   and N(1440) in Nuclear Medium",
    "url": "https://arxiv.org/abs/nucl-th/9308017"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8deab071-9d2a-4e64-9c70-5d7f30464abf",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}