IV.R420 — Physical Meaning of g_A = κ_D²/ι_τ

g_A = κ_D²/ι_τ: axial channel couples to D-sector (gravitational) because parity violation requires L-reflection symmetry breaking. κ(D;2)=(1−ι_τ)² enters squared (two axial vertices); single ι_τ denominates vector channel. g_A>1 because (1−ι_τ)>ι_τ^(1/2), making axial amplitude exceed vector amplitude.