{
  "revision": "2026-09-24-r1",
  "kind": "retrospective arithmetic baseline",
  "is_blind_holdout": false,
  "fitted_parameters_in_this_calculation": 0,
  "physical_validation": "Not established by this calculation",
  "theory_uncertainty_model": null,
  "fcc": {
    "coordinate_rule": "integer x,y,z; x+y+z even",
    "radius_squared": 168,
    "sites_including_origin": 4585,
    "outer_shell_sites": 48
  },
  "chart_masses": {
    "unit": "chart units",
    "node": 73360,
    "electron": 40,
    "proton": 73480
  },
  "comparison": {
    "node_term": {
      "exact_ratio": "1834",
      "decimal_value": "1834",
      "signed_residual": "-2.152673426",
      "signed_relative_residual_percent": "-0.1172382589506251268502407892972620059244",
      "exact_agreement_with_reference_central_value": false
    },
    "complete_v15": {
      "exact_ratio": "1837",
      "decimal_value": "1837",
      "signed_residual": "0.847326574",
      "signed_relative_residual_percent": "0.04614684749602052452350472740508707476387",
      "exact_agreement_with_reference_central_value": false
    }
  },
  "reference": {
    "quantity": "proton-electron mass ratio",
    "adjustment": "2022 CODATA",
    "value": "1836.152673426",
    "standard_uncertainty": "0.000000032",
    "unit": "dimensionless",
    "source_url": "https://physics.nist.gov/cuu/Constants/Table/allascii.txt",
    "checked_on": "2026-09-24"
  },
  "open_derivation": [
    "Why this shell is physically selected",
    "Why the chart mass assignments follow from dynamics",
    "A complete prediction with a specified uncertainty model"
  ],
  "input_sha256": {
    "v15-catalog.json": "be8969b31b0559a8219dcf0aa18798001b1e4f98b6f75d0381650f99f6bba0ab",
    "reference.json": "eaee7b6889824ca4744139ca309c0116b176181e15faa232c489431f8c61070f",
    "benchmark.py": "c7b88db7a0744bde2ba8159b033ef003a6cbdc3856de4c2f838ffe65f2643241"
  }
}