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

TL;DR

This paper uses the AdS/QCD holographic approach to analyze the gamma* gamma* to pi^0 form factor, showing it is vector meson dominated and aligns with experimental data for the lowest resonance.

Contribution

It applies the D4/D8 holographic model to compute the pi^0 transition form factor, establishing a connection with the pion form factor and matching experimental results.

Findings

Form factor is vector meson dominated.

Holographic results agree with experimental data.

Tie between transition form factor and pion form factor.

Abstract

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.