Technical Note: MQC-2026-03 Formalization of Inertial Mass Reduction via Higgs-EM Vacuum Saturation (ξ)

Description: This technical note provides the formal derivation for localized inertial mass reduction utilizing the fundamental Higgs-Electromagnetic coupling constant ($\xi \approx 0.0674$). Building upon the MQC (Modified Quantum Coupling) framework, this paper outlines the mechanism by which resonant electromagnetic saturation of the vacuum "decouples" matter from the Higgs field, effectively reducing effective mass ($m_{eff}$) toward a zero-point threshold. Key Mathematical Frameworks: The $\xi$ Constant: Identification of the 0.0674 coupling as the "Decoherence Floor" of the vacuum. The Sleeve Effect: Modeling of the $a^{-4}$ radiation pressure differential required to maintain localized vacuum stability. Inertial Symmetry Breaking: Application of MW/GW scale power requirements for field-dependent mass modulation. Predictive Alignment: This note establishes the theoretical foundation for the predicted velocity anomalies in the 2026 JUICE Earth Flyby and provides a mathematical solution to the Hubble Tension ($H_0 \approx 67.4$ km/s/Mpc) as a manifestation of large-scale vacuum coupling.