{
  "annotation_id": "e7adc409-9662-4f12-8af6-44fcf219b652",
  "date_created": "2026-03-02T18:00:01.307000Z",
  "date_modified": "2026-03-02T18:00:01.307000Z",
  "file_hash": "fa69869ad3899af52df54ec4353346e36bd2de11af880189a281cb0f069d89e4",
  "private": false,
  "record": {
    "abstract": "We investigate colorless (mesonic)\n  3q-q qbar components in the nucleon and the Roper resonance N*(1440).\n  Starting from constituent quarks and gluons we estimate the excitation of\nquark-antiquark pairs in a gluon exchange model with the strong coupling\nconstant extracted from a comparison with a non-perturbative resonating group\ncalculation of the pi, eta, rho and omega content of the nucleon. Applying the\nsame model to the Roper resonance, we find as the most striking result a very\nstrong scalar-isoscalar sigma content of the N*(1440) with a strength of the\n3q-q qbar configurations comparable to the 3q component itself.",
    "arxiv_id": "nucl-th/0405063",
    "authors": [
      "M. Dillig",
      "M. Schott"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.75.067001 10.1103/PhysRevC.76.019903",
    "journal_ref": "Phys.Rev.C75:067001,2007; Erratum-ibid.C76:019903,2007",
    "title": "Mesonic Content of the Nucleon and the Roper Resonance",
    "url": "https://arxiv.org/abs/nucl-th/0405063"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "993800e5-f246-4f6a-b9e0-8bad45ed319f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}