and [Formula omitted] transition form factor revisited

In light of recent experimental results, we revisit the dispersive analysis of the [Formula omitted] decay amplitude and of the [Formula omitted] transition form factor. Within the framework of the Khuri-Treiman equations, we show that the [Formula omitted] Dalitz-plot parameters obtained with a once-subtracted amplitude are in agreement with the latest experimental determination by BESIII. Furthermore, we show that at low energies the [Formula omitted] transition form factor obtained from our determination of the [Formula omitted] amplitude is consistent with the data from MAMI and NA60 experiments.