Oscillation Cancellation and Coherent Locking in USP Field Theory — A Geometric Explanation for Dark Matter

Dark matter remains one of the most persistent open problems in modern physics. This work presents a geometric explanation for dark matter behavior within USP Field Theory, without introducing new particles or modifying gravity. The model distinguishes coherent oscillation cancellation, where internal structure remains intact but external interaction is suppressed, from resonance failure, where oscillatory corridors collapse entirely. By separating cancellation from collapse, the framework explains transparency, weak interaction, and gravitational accommodation using a single resonance-based geometry controlled by Δf and a coherence metric κ. This document integrates with existing USP treatments of electrons, photons, and gravitational geometry, while preserving previous dark matter interpretations unchanged.