EW-3: Conscious Point Physics: The Z⁰ Boson — Icosahedral Closed Loop from 600-Cell Subgraph Dynamics

Abstract: EW-3 derives the Z⁰ boson as a charge-neutral, fully closed icosahedral loop of 12 vertices on a 600-cell subgraph. In contrast to the W⁰ bracelet's open topology, the icosahedral closure means the Z has no reactive openings and does not act as a catalytic intermediate. The mass m_Z = 91.1876 ± 0.0021 GeV is higher than m_W because the closed-loop topology produces denser SS-Vector confinement, with the loop density factor approximately 1.2 from closed-path bit reinforcement raising the effective geometric factor. Axial-vector coupling arises from symmetric four-layer phase interference in the closed loop, and decay widths and branching ratios match PDG 2026. The topological origin of the mass ratio m_Z/m_W = 1.134 in terms of the loop density factor is registered as an open problem.