{
  "annotation_id": "f990db18-7823-43cc-8544-8a8cbf703e46",
  "date_created": "2026-03-02T18:00:00.605000Z",
  "date_modified": "2026-03-02T18:00:00.605000Z",
  "file_hash": "a80fcf7bf6ab8c76b0ad66984c539bcb76c8bc23f7ef75503087c3bb4d3037f4",
  "private": false,
  "record": {
    "abstract": "We develop polarization observables for the processes $\\gamma N\\to\\pi\\pi N$\nand $\\pi N\\to\\pi\\pi N$, using both a helicity and hybrid helicity-transversity\nbasis. Such observables are crucial if processes that produce final states\nconsisting of a spin-1/2 baryon and two pseudoscalar mesons are to be fully\nexploited for baryon spectroscopy. We derive relationships among the\nobservables, as well as inequalities that they must satisfy. We also discuss\nthe observables that must be measured in `complete\u0027 experiments, and briefly\nexamine the prospects for measurement of some of these observables in the near\nfuture.",
    "arxiv_id": "nucl-th/0410012",
    "authors": [
      "W. Roberts",
      "T. Oed"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.71.055201",
    "journal_ref": "Phys.Rev.C71:055201,2005",
    "title": "Polarization Observables for Two-Pion Production off the Nucleon",
    "url": "https://arxiv.org/abs/nucl-th/0410012"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4f7f30e2-ef1c-449e-a920-241306f72e5b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}