The Two-Domain Equation: Mathematical Structure of Chirality as Pre-Coupling Orientation Condition (Accretion Theory Paper 2)

Paper 2 in the Accretion Theory series. Formalizes the two-domain partition of the geometric composition equation α(d,β) = 1 + d/(d+β): a right-handed domain α_R bounded on [1,2) and a left-handed domain α_L unbounded on (2,∞), separated by a singularity at d = β. Maps DNA helical forms (A, B, Z) to coupling states, derives the +1/2 chirality offset from self-coupling, produces buffer product = 5 and chirality gap = 4/3. Formalizes the impaction-radiation pulse structure (da-dum) as the asymmetric oscillation between bounded and unbounded domains. GCT Research Protocol II.