The Central Spine of Shadows in the Multiverse: A Unified Geometric Framework for Dark Matter, Dark Energy, Baryon Asymmetry, and the Strong CP Problem

We propose a novel theoretical framework. It unifies four major cosmological puzzles. These are the nature of dark matter, dark energy dynamics, baryon asymmetry, and the strong CP problem [1]. The unification is within a single geometric structure in higher-dimensional spacetime [2] [3]. The model relies on Randall–Sundrum warped geometry [4] [5], toroidal compactification of extra dimensions (3–6), and global Z2 mirror symmetry, producing 2–6 nearby mirror and near-mirror 3-branes at small angular separations θ ≲ 4◦. Dark matter arises as gravitational shadows from these layers, suppressed exponentially by Geff(θ) = GN e-kRθ. Dark energy results from the slow runaway evolution [6] of a stabilized radion field ϕ [7] (Goldberger–Wise combined with warped throat), yielding w(z) ≈ -1 + δw(z) with δw(z = 0) ≈ 0.03–0.10 at z ≲ 0.8. Baryon asymmetry ηb ≈ 6 × 10-10 emerges through a weak inter-brane portal with mixing εmix ∼ 10-10–10-12. The strong CP problem is solved by a bulk QCD axion that dynamically cancels θQCD, with warp suppression ensuring θeff ≪ 10-10. The model incorporates bulk Starobinsky inflation (ns ≈ 0.965, r < 0.001) [8] and reheating at Treh ≈ 108–109 GeV. It predicts systematic CMB corrections: CT T 2 suppression by 38–62%, quadrupole–octupole alignment of 1.1◦–2.9◦, and ξ(θ) smoothing by 9–16% at θ > 60◦. These effects match current 2.0–3.1σ Planck PR4/NPIPE anomalies and will be testable with CMB-S4, LiteBIRD, and Simons Observatory data in 2028–2035. The framework aligns well with DESI DR2 2025 data (w(z) > -1) and resolves the observed tensions without new fundamental particles or interactions. The model is testable and falsifiable through DESI DR3–DR5 (w(z) > -1), LZ/XENON/DARWIN (no DM particles), and CMBS4/LiteBIRD (low-ℓ anomalies persistence).