On the Son-Yamamoto relation in the soft-wall holographic model of QCD
  We study the vertex function of two vector and one axial-vector operators in the soft-wall holographic model of QCD. In particular, we discuss the possible relation, introduced by Son and Yamamoto, between the structure function $w_T$ describing such a vertex when one of the two vector currents represents an on-shell soft photon and the the two-point $\Pi_\perp^{VV}-\Pi_\perp^{AA}$ correlation function. 
Stefano Nicotri
hep-ph