GParity and the Interactions of Heavy Mesons

Some implications of the $G$ parity of heavy mesons are discussed. It is pointed out that the $G$ parity of a meson may determine whether it can contribute to a pole term in the nucleon-nucleon scattering amplitude. Since $G$ parity may not be conserved in the decays of some heavy mesons, $G$ must be determined indirectly. One method is to measure the charge parity of the decay products of a neutral meson, a quantity which determines $G$ is the isospin of the meson is known. Selection rules for the decay of neutral and charged mesons are given. Results are applied to the $\zeta$ and $\eta$ mesons.