Interface-Induced Baryon Asymmetry from Non-Adiabatic Phase Generation

We propose a minimal scaling framework in which the observed baryon asymmetry of the universe arises from interface-induced non-equilibrium dynamics within the Interface Precipitation Cosmology (IPC) framework. The baryon asymmetry scales as ηB ~ exp (-f) /f × εCP, where f ≈ 5. 457 is the dimensionless interface parameter established in Volume III (DOI: 10. 5281/zenodo. 20040358). CP violation naturally scales as εCP ~ O (1) × αEM³ due to electromagnetic scattering at the expanding interface. A key result is that the ratio of electromagnetic relaxation time to interface crossing time satisfies τᵣel/τᵢnt ~ 1/ (f αEM) ≈ 25 >> 1, placing the transition in a deeply non-adiabatic regime. In this limit, the Kibble-Zurek mechanism predicts an effective phase difference δₑff ~ O (1), leading to sin δ ~ O (1) without free parameters. The resulting estimate ηB ~ 2 exp (-f) αEM³ / f ≈ 6. 08 × 10^-10 is consistent with the Planck 2018 observed value. The result should be interpreted as a scaling relation rather than a precise prediction. This is Volume IV of the IPU (Interface Precipitation Universe) series. Related works: - Volume III (Two-Constant Framework): 10. 5281/zenodo. 20040358 - Volume II (Void Scale, Chapter X): 10. 5281/zenodo. 19883101 - IPU 8. 0 + SGWB: 10. 5281/zenodo. 19427118