Formula_25057

\[\frac{\partial}{\partial x_{\mu}} j_{\mu 5}(x)=2 i m \bar{\psi}(x) \gamma_{5} \psi(x)+\frac{e^{2}}{16 \pi^{2}} \varepsilon^{\alpha \beta \gamma \delta} F_{\alpha \beta} F_{\gamma \delta},\]