${\pi }^0,\eta ,{\eta }^{\prime }$ two-photon transition form factors in the holographic soft-wall model and contributions to $(g-2{)}_{\mu }$

Pietro Colangelo, Floriana Giannuzzi, Stefano Nicotri

We compute the two-photon transition form factors of the light pseudoscalar ${\pi }^0$, $\eta$ and ${\eta }^{\prime }$ mesons in a soft-wall holographic model of QCD with a solution of the $U(1{)}_A$…