V2.521 - Next-Decade Falsification Forecast
V2.521: Next-Decade Falsification Forecast
Motivation
The framework makes specific predictions with zero free dark energy parameters. How hard will the next decade of cosmological surveys test these predictions? This experiment computes the exact sigma at which every upcoming experiment tests the framework, and identifies the measurements that matter most.
Method
For 39 observables across 10 experiments (Euclid, CMB-S4, DESI Y5, Rubin LSST, Simons Observatory, LISA, LEGEND/nEXO, LHC), compute:
- The framework’s exact prediction
- The Planck LCDM prediction
- The expected future measurement precision (from collaboration design reports)
- The sigma separation between framework and LCDM at that precision
Key Results
Grand Combined Forecast
| Metric | Value |
|---|---|
| Total observables | 37 (quantitative) |
| Combined chi2 (FW vs LCDM) | 8.59 |
| Combined separation | 2.9 sigma |
The framework and Planck LCDM are distinguishable at 2.9 sigma across all next-decade surveys combined. This is in the “interesting tension” regime — enough to warrant serious attention but not yet decisive.
Top 5 Most Discriminating Measurements
| Rank | Experiment | Observable | FW-LCDM separation | Year |
|---|---|---|---|---|
| 1 | Rubin Y10 | S_8 (weak lensing) | 1.96σ | 2035 |
| 2 | Euclid | S_8 (cosmic shear) | 0.98σ | 2027 |
| 3 | Euclid | Omega_m (clustering) | 0.76σ | 2027 |
| 4 | DESI Y5 | D_V/r_d (z=0.51) | 0.69σ | 2028 |
| 5 | DESI Y5 | D_V/r_d (z=0.706) | 0.61σ | 2028 |
Weak lensing S_8 is the single most powerful discriminator — not BAO, not CMB, not RSD. This is because the framework predicts S_8 = 0.826 while Planck gives 0.832, a 0.7% difference that Rubin Y10 can resolve at its σ = 0.003 precision.
Discriminating Power by Category
| Category | Combined sigma |
|---|---|
| Weak lensing | 2.3σ |
| BAO distances | 1.5σ |
| Galaxy clustering | 0.8σ |
| H_0 (standard sirens) | 0.3σ |
| RSD growth rate | 0.3σ |
| CMB / DE EOS / particle | ~0σ |
Weak lensing dominates because S_8 = σ_8(Ω_m/0.3)^0.5 amplifies the framework’s lower Ω_m prediction. BAO provides complementary but weaker discrimination.
Discriminating Power by Experiment
| Experiment | Combined sigma | Year |
|---|---|---|
| Rubin Y10 | 2.0σ | 2035 |
| Euclid | 1.6σ | 2027 |
| DESI Y5 | 1.3σ | 2028 |
| Rubin Y1 | 0.6σ | 2027 |
| LISA | 0.3σ | 2037 |
Falsification Timeline
| Year | Experiments | Cumulative sigma |
|---|---|---|
| 2027 | Euclid, Rubin Y1, Simons Obs. | 1.7σ |
| 2028 | + DESI Y5 | 2.2σ |
| 2031 | + CMB-S4 | 2.2σ |
| 2035 | + Rubin Y10 | 2.9σ |
| 2037 | + LISA | 2.9σ |
By 2027, Euclid’s first data release will test the framework at 1.7σ combined. By 2028, DESI Y5 pushes to 2.2σ. The decisive test comes with Rubin Y10 (~2035) reaching 2.9σ combined.
Survival Scenarios
If the framework is true: LCDM would be disfavored at 2.9σ (by 2035). LCDM survives by adjusting its free Ω_Λ parameter, but the data would show a systematic pull toward the framework’s prediction.
If Planck LCDM is true: The framework accumulates 2.9σ of tension. This is not fatal (2-3σ is “interesting but not decisive”), but sustained tension across multiple independent probes would be damaging.
Kill Conditions (Binary Tests)
The gradual 2.9σ test from Ω_Λ precision is NOT the only path to falsification. The framework also faces binary kill conditions:
-
w ≠ -1 at >5σ (Euclid/DESI, ~2028): Framework predicts w = -1 EXACTLY from the Adler-Bardeen theorem. Any dark energy evolution instantly falsifies.
-
N_eff > 3.10 at >3σ (CMB-S4, ~2031): Framework requires N_eff = 3.044. Extra light species simultaneously ruin the Ω_Λ prediction (V2.515).
-
Dark vector discovery (LHC/dark photon searches): Any new vector shifts Ω_Λ by +4σ per vector. A single dark photon discovery falsifies.
-
H_0 = 73 confirmed by LISA standard sirens (~2037): Framework predicts 67.5. Distance-ladder-independent confirmation at 73.0 ± 0.5 would be a 5.3σ kill shot.
What This Means for the Science
The honest assessment
The framework’s predictions are very close to ΛCDM — they differ by only 0.4% in Ω_Λ. No single experiment in the next decade can decisively distinguish them through the Ω_Λ difference alone. The combined 2.9σ across all surveys is suggestive but not conclusive.
However, the binary kill conditions (w ≠ -1, extra species, new vectors) are decisive and testable within 5 years. DESI Y3 (~2026) is the first critical test: if the w ≠ -1 hint strengthens to >3σ, the framework is in serious trouble.
What experimentalists should prioritize
-
S_8 precision — This is the single most discriminating observable. Euclid cosmic shear and Rubin LSST weak lensing are the most important measurements.
-
Dark energy EOS — w_0 and w_a are binary kill/confirm tests. DESI Y3 and Euclid combined constraints are critical.
-
N_eff precision — CMB-S4’s σ(N_eff) = 0.03 probes the framework’s required particle content. This is a unique prediction no other dark energy theory makes.
The information-theoretic advantage
Even if the framework and LCDM give similar chi-squared values, the framework has ZERO free dark energy parameters while LCDM has ONE. The AIC penalty of +2 for LCDM’s extra parameter means the framework wins unless LCDM improves chi² by >2. With current data (V2.520: χ²/dof = 1.07 for framework), LCDM cannot improve enough.
Verdict
The next decade will test the framework at 2.9σ combined through gradual Ω_Λ precision tests, with the decisive contribution from weak lensing S_8. But the real falsification risk comes from binary kill conditions — dark energy evolution (w ≠ -1), extra light species, or dark vector discovery — any of which would be instantly fatal. DESI Y3 (~2026) is the first critical checkpoint. The framework makes specific, testable predictions for every upcoming survey, published here BEFORE the data arrives.