Anomalous Behavior ofγγ→nπ0in Effective Lagrangians

Abstract

A recent result of Aviv, Hari Dass, and Sawyer, relating the anomalous value of $\gamma \gamma \to \left(\mathrm{any}\mathrm{odd}\mathrm{number}\mathrm{of}\mathrm{pions}\right)$ to the anomalous rate of ${\pi }^0\to 2\gamma$, is demonstrated by conventional graph techniques. It is also shown that the neutral mode $\gamma \gamma \to n{\pi }^0$ is suppressed for all odd $n$.