${\pi }^0\to 2\gamma$ decay under strong magnetic fields in the NJL model

Máximo Coppola, Daniel Gomez Dumm, Norberto N. Scoccola

We study the anomalous ${\pi }^0\to \gamma \gamma$ decay under an external uniform magnetic field in the framework of a two-flavor Nambu-Jona-Lasinio model. It is seen that the full decay width g…