The Cosmic Microwave Background (CMB) and Dark Matter as Fossils of Primeon Cosmogenesis

We present a first-principles derivation of the present-day Cosmic MicrowaveBackground (CMB) temperature within the Primeon Framework. The CMB is interpreted not as a purely historical relic of recombination, but as the fossil remnant of an early vacuum–radiation resonant equilibrium governed by prime-structured vacuum dynamics. Using a discrete C8 coherence cell, a prime-weighted stiffness functional, and a dynamical freeze-out condition based on vacuum relaxation rates, we derive the observed CMB temperature T0 ' 2.73 K without fitting to observational data. The derivation cleanly separates structural assumptions from empirical inputs and clarifies which ingredients are fundamental versus contingent. A novel interpretation of Dark Matter (DM) within the Primeon Framework, wherein dark matter emerges as amplitude-dominated Z(1) primeon excitations with suppressed phase degrees of freedom. Unlike conventional particle dark matter models, this framework identifies dark matter as structured vacuum curvature that interacts gravitationally but is kinematically forbidden from electromagnetic coupling. We derive the key observational consequences including flat rotation curves, smooth halo profiles, and early structure formation, while explaining why dark matter neither radiates nor thermalizes. This interpretation provides natural explanations for galactic dynamics without invoking weakly interacting massive particles (WIMPs) or modified gravity theories.