The Hercules–Corona Borealis Great Wall as the Cosmic Coherence Horizon in G-MaTT

Abstract We identify the Hercules–Corona Borealis Great Wall (Her-CrB GW)—a 10 Gly filament spanning ∼10% of the observable universe—as the cosmic coherence horizon: the maximal stable structure in Generalized Mass as Twisted Time (G-MaTT). In G-MaTT, spacetime and matter emerge via symmetry breaking U(1) × SU(2) → SO(3,1) in the pre-geometric potential ℳ_μ (Yeo 2025c,d). The Her-CrB GW is a primordial domain wall network—frozen at initiation—not assembled by gravity. Its 10 Gly scale is predicted exactly by the Twist-Untwist Threshold (TUT) equilibrium: L_crit = c · τ_TUT = c · 10¹⁰ yr = 10 Gly, where τ_TUT = 10¹⁰ yr is the coherence timescale for near-zero-velocity ℳ_μ-branches (𝒲_TUT → 1). This resolves the “mathematical impossibility” in ΛCDM: structure arises with spacetime, not in it. Homogeneity holds in ℳ_μ (⟨ℳ_μ⟩ = 0), while emergent inhomogeneities are spontaneous symmetry breaking—like magnetization domains. No fine-tuning, no new physics—just phase, torsion, and topology. With α⁻¹ = 137.035999206 now derived (Yeo 2025b), and neutrino anomalies, rotating filaments, and cosmic rings explained, G-MaTT unifies quantum and cosmic scales.