{
  "annotation_id": "99c02081-74ea-4acb-8561-dcd54aea1efd",
  "date_created": "2026-03-02T18:00:01.028000Z",
  "date_modified": "2026-03-02T18:00:01.028000Z",
  "file_hash": "1db7ecb3b00accec6ff23bc8fcbaacaf128b3e08fbc8042564e5564765860098",
  "private": false,
  "record": {
    "abstract": "We study the structure of the baryon resonances $\\Lambda(1405)$ and\n$\\bar\\Lambda(1405)$ in $J/\\psi$ four body decays $J/\\psi\\to \\Sigma\\bar \\Sigma\n\\pi\\pi$ in the framework of a coupled channel chiral unitary approach. With\nstill sufficient freedom for model parameters, the $\\Lambda(1405)$ and\n$\\bar\\Lambda(1405)$ resonances are generated by simultaneously taking the meson\nbaryon and meson anti-baryon final state interactions into account. The\n$\\pi\\Sigma$ ($\\pi\\bar\\Sigma$) invariant mass distributions peak around 1410\nMeV, which favors the assertion that the $\\Lambda(1405)$ ($\\bar\\Lambda(1405)$)\nis a superposition of the two $\\Lambda(1405)$ ($\\bar\\Lambda(1405)$) states\nwhich dominantly couple to $\\bar K N$ ($K\\bar N$) and $\\pi\\Sigma$\n($\\pi\\bar\\Sigma$), respectively. We also calculate the amplitude for isospin\nI=1 which gives hints on a possible I=1 baryon resonance in the energy region\nof the $\\Lambda(1405)$, which up to now has not been observed.",
    "arxiv_id": "nucl-th/0409076",
    "authors": [
      "Chiangbing Li",
      "E. Oset"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.70.065202",
    "journal_ref": "Phys.Rev. C70 (2004) 065202",
    "title": "$\\Lambda(1405)$ and $\\bar\\Lambda(1405)$ in $J/\\psi$ four-body decays",
    "url": "https://arxiv.org/abs/nucl-th/0409076"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "67e2ff64-9f27-4cde-a0b0-e4a1706b1758",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}