{
  "annotation_id": "8d2d504e-1d56-490e-a12f-dfdc1ddc27b2",
  "date_created": "2026-03-02T18:00:28.033000Z",
  "date_modified": "2026-03-02T18:00:28.033000Z",
  "file_hash": "3a775244757ccec72725a19953d497f8aae8470c209997f5aba49f32b83d2cba",
  "private": false,
  "record": {
    "abstract": "The rainbow truncation of the quark Dyson-Schwinger equation is combined with\nthe ladder Bethe-Salpeter equation for the dressed quark-photon vertex to study\nthe low-momentum behavior of the pion electromagnetic form factor. With model\ngluon parameters previously fixed by the pion mass and decay constant, the pion\ncharge radius $r_\\pi$ is found to be in excellent agreement with the data. When\nthe often-used Ball-Chiu Ansatz is used to construct the quark-photon vertex\ndirectly from the quark propagator, less than half of $r_\\pi^2$ is generated.\nThe remainder of $r^2_\\pi$ is seen to be attributable to the presence of the\n$\\rho$-pole in the solution of the ladder Bethe-Salpeter equation.",
    "arxiv_id": "nucl-th/9910033",
    "authors": [
      "P. Maris",
      "P. C. Tandy"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.61.045202",
    "journal_ref": "Phys.Rev.C61:045202,2000",
    "title": "The Quark-Photon Vertex and the Pion Charge Radius",
    "url": "https://arxiv.org/abs/nucl-th/9910033"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "81c96d8a-3da8-4fd0-850b-acfd782f3786",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}