Force, Energy, and Δf-Elasticity in USP Field Theory: A Unified Interpretation Consistent with Classical and Relativistic Dynamics (v1.1 2026)

This note presents a USP Field Theory interpretation of force and energy that preserves established classical and relativistic dynamics. Force is treated as directional energy transfer distributed over an effective interaction corridor length (“corridor bookkeeping”): F_parallel ≈ ΔE_dir / ℓ_corr. The corridor length ℓ_corr is defined operationally and can be estimated from measurable proxies such as (1) beamline interaction geometry, (2) mean free path (nσ)^−1 for a chosen coupling channel, or (3) interferometric coherence length. The note provides worked scaling examples, relates a phenomenological mismatch-response factor R_usp to the standard relativistic divergence metric (γ − 1), and maps an illustrative collapse mismatch scale (~10^19 Hz) to an energy scale (~40 keV) using E = h f. A dedicated “Observational Alignment” section clarifies compatibility with accelerator data, Lorentz invariance constraints (including Michelson–Morley–type null tests), and high-energy astrophysical contexts, emphasizing that USP does not assume a dense drag medium. The framework is presented as an interpretive layer (mechanism and operational proxies) rather than a replacement for tested equations.