Electroweak Boson Masses from Icosahedral Geometry

We derive the electroweak sector from icosahedral geometry. The proton contains three twin prime couplings with products 35, 143, 323 (sum 501). The VEV emerges as v = 501 × [(V−1)/(F+1)] × m_p = 246.09 GeV (0.05% error), where the projection factor 11/21 = (vertices−1)/(faces+1) follows from the equation (D+1)×5+1 = D×7, which uniquely determines D = 3. The Higgs mass is m_H = 501/4 = 125.25 GeV (exact match). The W boson involves only the boundary twin: m_W = 323/4 = 80.75 GeV (0.5% error). The Z boson involves additional structure: m_Z = (323+35+8)/4 = 91.5 GeV (0.3% error). The Weinberg angle follows: sin²θ_W = 1−(323/366)² = 0.221 (0.8% error). All five quantities derive from D = 3 geometry with zero free parameters.