Status update: ${\pi }^0\to {\gamma }^{\ast }{\gamma }^{\ast }$ transition form factor on CLS ensembles

Jonna Koponen, Antoine Gérardin, Harvey B. Meyer +2

In this report we present the status of the Mainz group's lattice QCD calculation of the pion transition form factor, which describes the interaction of an on-shell pion with two o…