The main features of $\gamma \gamma \to {\rho }^{\pm }{\pi }^{\mp }$ are studied in terms of a gauge-invariant (Born) amplitude constructed from the phenomenological ${\rho }^{\pm }\to {\pi }^{\pm }\gamma$ coupling. Large cross sections are predicted and the possibility of determining the ${\rho }^{\pm }$-meson magnetic moment is considered.

• Received 23 October 1981

DOI:https://doi.org/10.1103/PhysRevD.25.2306