Chapter 24: The Neutrino as Time Eigenmode

The neutrino is the ghost particle—almost massless, weakly interacting, mysterious. In Category τ the mystery dissolves: the neutrino is the τ¹ time eigenmode that emerges in β^- decay. It is literally a “ray of time” made manifest as a particle. Its near-masslessness, its weak-only interaction, and its definite helicity all follow from a single geometric fact: the neutrino lives primarily on the base τ¹, with minimal τ² footprint.