The ω→π0γ* and φ→π0γ* transition form factors in dispersion theory

We present a dispersion-theoretical approach to the ω→π0γ* and φ→π0γ* electromagnetic transition form factors. The study relies solely on a previous dispersive analysis of the corresponding three-pion decays and the precisely known pion vector form factor. Our numerical results are compared to recent measurements of the ω→π0μ+μ- decay spectrum by the NA60 collaboration. We strongly encourage experimental investigation of the Okubo-Zweig-Iizuka-forbidden φ→π0l+l- decays in order to understand the strong deviations from vector-meson dominance found in these transition form factors.