5.1. Mass as a property of a mode
The original book links inertia with the delay involved in forming a composite record. A physical mass must be identified consistently through acceleration response, rest energy, and dispersion; delay alone does not supply that identification.
Suppose a stable excitation has rest frequency in a calibrated physical time and obeys
With and , comparison with Eq. (3.12) gives
A dimensionless eigenvalue becomes a mass only after its time scale, action scale, and propagation scale are fixed. The frequency must also belong to a physical excitation above the vacuum, rather than to an arbitrary auxiliary operator.
Internal kinetic and binding contributions enter a composite system’s invariant mass. Higgs couplings supply charged elementary fermion masses in the Standard Model after electroweak symmetry breaking. A generative account must recover the observed spectrum and interactions.


