Interference, Mixing, and Angular Correlations in Decays of Boson Resonances

Two new features of boson resonances are discussed. (1) Interference and mixing in decays of different bosons having common decay channels, and (2) competition between partial-wave amplitudes when more than one is allowed. Several examples are considered. Interference between $f^0\to K\overline{K}$ and ${A_2}^0\to K\overline{K}$ is discussed. The axial-vector nonets are discussed in detail, as well as the application to higher-spin resonances.