"Version 3 — Live Validation January 8, 2026"

"We report the empirical discovery of a statistical boundary at χ = 0.15 in magnetized plasma perturbations, where χ ≡ max(|ΔB/B|, |Δn/n|, |ΔV/V|). Analysis of 1.48 million observations from DSCOVR (Earth solar wind), MAVEN (Mars), and USGS ground magnetometers shows that χ exhibits attractor behavior, with 52% of observations clustering at 0.145 ≤ χ ≤ 0.155. In raw data, temporary violations occur (~55% in OMNI series) but are followed by rapid recovery to the boundary. The value numerically matches (m_e/m_p)^(1/4) ≈ 0.153 within ±1.8%. Temporal analysis reveals quantized response modes at 6-hour intervals, with a 0.9-hour subharmonic. We propose four working hypotheses to explain the pattern but provide no theoretical derivation. The boundary is independently reproducible and offers predictive utility for space weather forecasting." Conclusion (Revised): "The χ = 0.15 boundary is a robust empirical observation across multiple plasma environments. Its numerical coincidence with particle mass ratios and quantized temporal response suggest a deeper physical principle, but we cannot yet derive it from first principles. Future work should focus on: (1) theoretical models explaining the (m_e/m_p)^(1/4) connection, (2) testing the boundary in additional environments (PSP, MMS, Solar Orbiter), and (3) developing predictive algorithms for space weather based on χ proximity to 0.15. This discovery provides a new constraint for plasma turbulence models and a falsifiable prediction for upcoming missions."