{
  "annotation_id": "e0add01d-5bee-4e7b-a034-ad8d3cff806a",
  "date_created": "2026-03-02T18:00:04.986000Z",
  "date_modified": "2026-03-02T18:00:04.986000Z",
  "file_hash": "587e9d6173b5ade3000b1f1d4e04f96d9017cf4f90623d61ab93e358ed64e5ac",
  "private": false,
  "record": {
    "abstract": "Whereas ground state spectroscopy for quenched QCD is well understood, it is\nstill a challenge to obtain results for excited hadron states. In our study we\npresent results from a new approach for determining spatially optimized\noperators for lattice spectroscopy of excited hadrons. In order to be able to\napproach physical quark masses we work with the chirally improved Dirac\noperator, i.e., approximate Ginsparg-Wilson fermions. Since these are\ncomputationally expensive we restrict ourselves to a few quark sources. We use\nJacobi smeared quark sources with different widths and combine them to\nconstruct hadron operators with different spatial wave functions. This allows\nus to identify the Roper state and other excited baryons, also in the strange\nsector.",
    "arxiv_id": "nucl-th/0501025",
    "authors": [
      "Tommy Burch",
      "Christof Gattringer",
      "Leonid Ya. Glozman",
      "Christian Hagen",
      "Dieter Hierl",
      "Reinhard Kleindl",
      "C. B. Lang",
      "Andreas Schaefer"
    ],
    "categories": [
      "nucl-th",
      "hep-lat",
      "hep-ph"
    ],
    "doi": "10.1016/j.nuclphysa.2005.03.058",
    "journal_ref": "Nucl.Phys. A755 (2005) 481-484",
    "title": "Masses of excited baryons from chirally improved quenched lattice QCD",
    "url": "https://arxiv.org/abs/nucl-th/0501025"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e4a1820a-e956-4ae6-87bf-baca0450ac73",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}