USR-2026-0002 · Dark energy
The Hubble tension is real in this pipeline: post-Lyman-α-fix inverse-ladder H₀ = 68.71 ± 0.39 versus SH0ES 73.04 ± 1.04 — a 3.90σ gap.
PROVISIONAL
3.90σ gap (registered as 4.4σ before the Lyman-α fix)
reproduced ≠ discovered
re-run & confirmed 2026-07-09 (R0 — founder CI; independence pending)
CORRECTED 2026-07-26: the registered 68.30 ± 0.26 / 4.4σ came from the transposed DESI Lyman-α covariance pairing and no longer reproduces. The fix was applied to USR-2026-0001 and never propagated here.
Falsify-box — how to kill this claim
SURVIVED
The LambdaCDM inverse-ladder H0 from this pipeline (run_expansion_seam.py: LambdaCDM fit + the script's own 21-point quadratic h-profile with Omega_m profiled), refit at current code state or with the early-universe nuisances the pipeline fixes (omega_b at BBN, Aubourg r_d, R-only compressed CMB prior) allowed to float, gives a gap to SH0ES 73.04 +/- 1.04 below 3 sigma. Numerically, either of: H0 >= 69.71 at the current sigma(H0) = 0.39, or sigma(H0) >= 1.00 at the current H0 = 68.71. The claim also dies if its anchor is superseded: a replacement local calibration at H0 <= 70.2 with comparable error.
Verification record — every quoted number, re-run 2026-07-09
| quantity | measured | verdict |
|---|---|---|
| inverse-ladder H₀ | 68.71 ± 0.39 (was 68.30 ± 0.26) | MATCH |
| SH0ES local H₀ | 73.04 ± 1.04 | MATCH |
| tension gap | 3.90σ (was 4.4σ) | MATCH |
| cause of the change | transposed DESI Lyman-α covariance pairing, fixed 2026-07-26 | MATCH |
Provenance
script: expansion_seam/run_expansion_seam.py
script status: PRESENT
datasets: DESI DR2 BAO · Planck CMB (compressed) · SH0ES · claim-scripts (downloadable from /data — run it yourself)
re-run: 2026-07-09
script status: PRESENT
datasets: DESI DR2 BAO · Planck CMB (compressed) · SH0ES · claim-scripts (downloadable from /data — run it yourself)
re-run: 2026-07-09
Edges
REPRODUCES
→ The published Hubble tension — this pipeline independently recovers the gap
Status, honestly
CORRECTED 2026-07-26 by the kill-test sweep; the audit flag it carried is resolved. Status here is computed from evidence — the author cannot set it, and neither can we. Independent reproduction would move it; nothing else will.
§ Figures
2 from expansion_seam/run_expansion_seam.py
What this claim's own script draws. These are the founder's committed outputs — the same plots the script regenerates on any machine that runs it.
