Copy full text Step from BC structure to CKM θ₂₃ ArXe Research · July 2026 · Diego Luis Tentor Derivation document — part of the route toward E4 Not to be cited or distributed without authorization 1. The result to derive θ₂₃ CKM = arctan(3²×γ / 5³) = 2.38°. The factor γ (Euler-Mascheroni constant) appears in the numerator. The question…