UD Theory in the Microscopic Low-Energy Regime: Consistency with QED

This paper demonstrates the consistency of UD theory with quantum electrodynamics (QED) in the microscopic low-energy regime. From the UD axioms, the fundamental mass scale is exactly m₀ = 1/ (2πe^π) in natural units. In Planck units (MP = 1), the dimensionless ratio is m₀/MP = 1/ (2πe^π) ≈ 0. 00688, an exact consequence of the UD axioms. All four aspects UU, UD, DD, DU have masses determined by m₀, of order MP. At energies E ≪ MP, these heavy fields cannot be produced as real particles. They can only appear as virtual particles in loop diagrams, and their propagators are suppressed by 1/m₀² ~ 1/MP². Integrating out the heavy fields from the UD action yields an effective Lagrangian at low energies: Lₑff = LQED + (c₅/MP) O₅ + (c₆/MP²) O₆ +. . . Taking the electron anomalous magnetic moment aₑ = (g-2) /2 as an example, we compute the one-loop diagram with a heavy field exchanged between the electron and the photon. Using standard techniques and the UD constants, the correction satisfies the upper bound: δaₑUD ≤ 3. 54×10^-24. The current experimental precision is Δaₑᵉxp ≈ 2. 8×10^-13 (CODATA 2022). The UD correction is at most eleven orders of magnitude below experimental precision, completely unobservable. We also discuss other low-energy observables: - Lamb shift: UD correction ~ 10^-11 eV (precision ~ 10^-6 eV) - Muon g-2: UD correction ≤ 7. 31×10^-22 (precision 4. 6×10^-10), cannot explain the 4. 2σ discrepancy- High-energy colliders: E/MP ~ 10^-16, effects completely negligible This explains why QED has been so successful over the past seven decades: the fundamental scale of UD theory is the Planck scale, and all corrections are suppressed by powers of E/MP. No deviation from QED is expected at currently accessible energies. The UD theory is fully consistent with all existing QED tests.