gamma^* gamma^* -> pi^0 Form Factor from AdS/QCD

Understand

The recently measured $\gamma\gamma^*\rightarrow \pi^0$ anomalous form factor is analyzed using the $D4/D8\bar{D8}$ holographic approach to QCD.

• The half-on-shell transition form factor is vector meson dominated and is shown to exactly tie to the pion form factor.
• The holographic result compares well with the data for the lowest vector resonance.