The CMB temperature two-point correlation function should show substantial power even at very large angles in a statistically isotropic Gaussian universe (Spergel 2003; Planck 2016). COBE, WMAP, and Planck reveal that the temperature correlation above about 60 degrees is anomalously low, with the S_1/2 statistic far below the ΛCDM expectation. The feature is robust across masks and estimators and difficult to attribute to chance or foregrounds (Copi 2010; Schwarz 2016).
The standard model assumes Gaussian random initial conditions stretched to all observable scales by inflation. Substantial CMB temperature correlation at all angular separations is mandatory under those assumptions. A persistent lack of correlation above 60 degrees has nowhere to go in the model except as a statistical fluke or as new physics modifying the largest scales.
SCT replaces the hot-dense-center with a superluminal collision and the thermalized debris field. From this single change, the cascade has a finite largest characteristic scale — Λ_max ≈ 2 × R_pocket ≈ 5 Gpc set by the parent-pocket size (P55). The angular cutoff at approximately 60 degrees corresponds to about 10 Gpc comoving at z = 1, matching the cascade-event extent of roughly 2 × Λ_max. Beyond this scale, no cascade event linked separated regions to each other, so the temperature correlations between widely separated regions are uncorrelated by construction.
The lack of angular correlation above 60 degrees is therefore the direct fingerprint of the cascade's finite extent, not a statistical anomaly. The cosmic-web filament network (P34) and angular-momentum inheritance (P31, P32) propagate cascade-deposited correlations across smaller angular scales, but the largest-scale correlations are absent because no cascade event spans them. Pre-existing matter from prior cycles (P25) preserves a residual coherence at the very largest scales, but at amplitude well below detectability.
The same M10 framework that produces the low-l power deficit (recid 32), the CMB Axis of Evil (recid 24), and the connected quadrupoles (recid 18) produces the missing-correlation signal. The angular cutoff aligns with the cascade-axis direction (approximately perpendicular to the CMB dipole per P64) at a small directional preference: correlations are slightly stronger along the J-axis direction than perpendicular to it. There is no need for new physics modifying the largest scales.
If precision CMB-S4 polarization analysis finds the lack-of-correlation cutoff is statistically isotropic at the 1% level (no directional preference aligned with the cascade J axis or other anomaly axes), the M10 finite-cascade-extent explanation is refuted. The signature SCT prediction is correlations slightly stronger along the J-axis direction than perpendicular to it.