A theoretical analysis of the doubly radiative decays ${\eta }^{(\prime )}\to {\pi }^0\gamma \gamma$ and ${\eta }^{\prime }\to \eta \gamma \gamma$

Rafel Escribano, Sergi Gonzàlez-Solís, Renata Jora +1

The scalar and vector meson exchange contributions to the doubly radiative decays ${\eta }^{(\prime )}\to {\pi }^0\gamma \gamma$ and ${\eta }^{\prime }\to \eta \gamma \gamma$ are analysed within the Linear Sigma Model and Vector…