{
  "visual_id": "C02-charged-threshold",
  "title": "Empirically calibrated alpha\u2013alpha continuum",
  "classification": "conditional_numerical_experiment",
  "run_ids": [
    "20260929T023727021282Z-E18-halo"
  ],
  "claim_ids": [
    "C02"
  ],
  "input_files": [
    {
      "path": "runs/20260929T023727021282Z-E18-halo/threshold-response-map.csv",
      "sha256": "2d4c6b5f1637732b36f9ce90e9f7b96201ee61a094e2a7dfca26c3fdc2c3361c"
    },
    {
      "path": "runs/20260929T023727021282Z-E18-halo/results.json",
      "sha256": "302e99438de529af8afb5343c6ac14e54b29b3a939e0a28c960f24c9b1efbc2a"
    }
  ],
  "configurations": {
    "E18-halo": {
      "pole_energy_MeV": 0.09184,
      "pole_width_MeV": 5.57e-06,
      "shape_fm3": -1.62,
      "shape_corner_half_range_fm3": 0.08,
      "width_corner_half_range_MeV": 2.5e-07,
      "contact_derivatives_inverse_fm": [
        -0.1,
        0.0,
        0.1
      ],
      "alpha_fraction_range": [
        -0.012,
        0.012
      ],
      "seed": 180803,
      "pole_reference": "https://academic.oup.com/ptep/article/2021/11/113D02/6380952",
      "EFT_reference": "https://arxiv.org/abs/0802.3426v2"
    }
  },
  "assumptions": {
    "E18-halo": [
      "Coulomb-resummed S-wave cluster effective theory with a shape term; its validity is low energy and it supplies no Hoyle three-body prediction.",
      "The ordinary pole is calibration input. Exact complex matching and independent real-axis evaluation are mathematical cross-checks, not independent measurements.",
      "Unknown short-distance electromagnetic response is scanned independently with c0(delta)=c0(0)+q*delta. q is the derivative at the ordinary point. Frozen charged-ERE coefficients are only one convention scenario.",
      "Shape/width corners quantify sensitivity without inventing the unpublished covariance or a posterior.",
      "Adaptive interpolation is checked against disjoint direct EFT evaluations, not against unavailable eight-body lattice data.",
      "Complex outgoing poles are solved above 10 keV. Below that scale the Coulomb width is negligible at the stated numerical precision; its logarithm is retained without underflow."
    ]
  },
  "plotted_values": {
    "path": "C02-charged-threshold-data.json",
    "sha256": "637a8f6b015d25ca2ec9044068e604ae201a2b5d26eb2bee684418eff56f8f56"
  },
  "caption": "A separate Coulomb-resummed cluster EFT matches the empirical 91.84 keV, 5.57 eV Be-8 pole. Complex outgoing poles replace the real-axis approximation above 10 keV; widths below that scale are negligible at the stated precision. Short-range derivatives are scenarios, not measured inputs. Greedy interpolation uses 64 disjoint direct EFT checks; its accuracy is neither lattice accuracy nor an EFT-theory error estimate.",
  "alt_text": "Changing the unmeasured contact response changes which alpha variation binds Be-8. Reserved interpolation error drops from about 2422 eV to 17 eV.",
  "generator": "src/metastable/experiment_report.py",
  "generator_sha256": "00ba19fa7e51a7b74e16e13e473754e9c41eedcadda657586c8f5ceb1b90100f",
  "command": "python run.py full experiment-report",
  "output_sha256": {
    "svg": "927af8f04f1baead60bf5ac7848ff8f93f96bfee1dc9f659fd3250e88b50c9cf",
    "png": "6dc48d1e090bd8204cf8e49c0b11877a1d4aaf6252c2191e5f7eba4bfda54a42"
  }
}