Sum rules of the preceding paper together with appropriate $\mathrm{SW}\left(2\right)\mathrm{}$ and broken $\mathrm{SU}\left(3\right)\mathrm{}$ relations have been solved numerically in the pole-dominance approximation. In this way, we compute all relevant parameters entering in the theory, including $\eta -X$ mixing effects. As applications, we calculate $\eta \to 2\gamma$, $X\to \eta 2\pi$, $X\to 2\gamma$, and $X\to 2\pi \gamma$ decay rates.

• Received 8 December 1969

DOI:https://doi.org/10.1103/PhysRevD.1.2058