Assessment of the $a_2(1320)$ tensor-meson contribution to $\eta /{\eta }^{\prime }\to {\pi }^0\gamma \gamma$ decays

Rafel Escribano, Sergi Gonzàlez-Solís, Emilio Royo

In light of the recent measurement of the $\eta \to {\pi }^0\gamma \gamma$ decay by the KLOE-2 Collaboration, a previous analysis including vector- and scalar-meson exchange contributions using the V…