“…1(a)], and consequently its integrated decay width might be linked to a normalization problem associated to the parameter g in Eqs. (11) and (24). One could argue, though, that this parameter is fixed by the VPγ experimental data, which is measured nowadays to a high degree of accuracy and leads to satisfactory predictions for the other two processes, i.e., η 0 → π 0 γγ and η 0 → ηγγ, and, therefore, should not be changed.…”