Pseudoscalar pole contribution to the hadronic light-by-light piece of $a_{\mu }$

Adolfo Guevara, Pablo Roig, JJ Sanz Cillero

We have studied the $P\to {\gamma }^{\star }{\gamma }^{\star }$ form factor in Resonance Chiral Theory, with $P={\pi }^0,\eta ,{\eta }^{\prime }$, to compute the contribution of the pseudoscalar pole to the hadronic light-by-…