Axial Anomaly Effects in Pion and $Z^0$ Radiative Decays
  We discuss a connection between axial anomaly and polarized radiative processes. By comparison with the corresponding unpolarized cases, we consider some physical outputs for the $\pi^+$ and $Z^0$ polarized radiative decays. We analyse in detail the pattern of mass singularity cancellation. 
Luca Trentadue and Michela Verbeni (Dipartimento di Fisica,   Universita' di Parma, Italy)