{
  "annotation_id": "f0355325-7358-4d50-9ca1-c09149d37e0f",
  "date_created": "2026-03-02T18:00:19.122000Z",
  "date_modified": "2026-03-02T18:00:19.122000Z",
  "file_hash": "4f2399bf4345b1881037e65db707e522af360309646d4668f7c957f4e706c32e",
  "private": false,
  "record": {
    "abstract": "In a previous paper virtual Compton scattering off the nucleon has been\ninvestigated in the one-loop approximation of the linear sigma model in order\nto determine the 3 scalar generalized polarizabilities. We have now extended\nthis work and calculated the 7 vector polarizabilities showing up in the\nspin-dependent amplitude of virtual Compton scattering. The results fulfill 3\nmodel-independent constraints recently derived. Compared to the constituent\nquark model there exist enormous differences for some of the vector\npolarizabilities. At vanishing three-momentum of the virtual photon, the\nanalytical results of the sigma model and of chiral perturbation theory can be\nrelated. The influence of the $\\pi^{0}$ exchange in the $t$ channel has been\ndiscussed in some detail. Besides, the vector polarizabilities determine 2\nlinear combinations of the third order spin-polarizabilities appearing in real\nCompton scattering.",
    "arxiv_id": "nucl-th/9705010",
    "authors": [
      "A. Metz",
      "D. Drechsel"
    ],
    "categories": [
      "nucl-th",
      "hep-ph"
    ],
    "doi": "10.1007/s002180050384",
    "journal_ref": "Z.Phys. A359 (1997) 165-172",
    "title": "Generalized polarizabilities of the nucleon studied in the linear sigma   model (II)",
    "url": "https://arxiv.org/abs/nucl-th/9705010"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1fe43476-cb79-4a75-8bf9-43ed7098fdd1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}