{
  "annotation_id": "62892d30-aa1e-476e-b2a9-da8e06df1f7f",
  "date_created": "2026-03-02T18:00:22.361000Z",
  "date_modified": "2026-03-02T18:00:22.361000Z",
  "file_hash": "40d6812196e351e0848e6bc258781b49f3f693838f908510c6e1a917dab58337",
  "private": false,
  "record": {
    "abstract": "A new sum rule for $\\gamma_\\pi$, the backward spin polarizability of the\nnucleon, is derived from a backward-angle dispersion relation. Taking into\naccount single- and multi-pion photoproduction in the s-channel up to the\nenergy 1.5 GeV and resonances in the t-channel with mass below 1.5 GeV, it is\nfound for the proton and neutron that $[\\gamma_\\pi]_p$ = -39.5 +/- 2.4 and\n$[\\gamma_\\pi]_n$ = 52.5 +/- 2.4, respectively, in units of 10^{-4} fm^4.",
    "arxiv_id": "nucl-th/9807032",
    "authors": [
      "A. I. L\u0027vov",
      "A. M. Nathan"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.59.1064",
    "journal_ref": "Phys.Rev. C59 (1999) 1064-1069",
    "title": "Sum rule for the backward spin polarizability of the nucleon from a   backward dispersion relation",
    "url": "https://arxiv.org/abs/nucl-th/9807032"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9e617b3e-89c1-4104-900c-52fc5c567bd6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}