11.06.12 16:15

Dispersive analysis of the ω and φ → π0 γ* transition form factors

Sebastian Schneider (Bonn)

We calculate the ω → π0 γ* and φ → π0 γ* electromagnetic transition form factors based on dispersion theory, relying solely on a previous dispersive analysis of the corresponding three-pion decays and the pion vector form factor.  We compare our findings to recent measurements of the ω → π0 μ+μ- decay spectrum by the NA60 collaboration, and strongly encourage experimental investigation of the Okubo-Zweig-Iizuka-forbidden φ  → π0 l+l- decays in order to understand the strong deviations from vector-meson dominance found in these transition form factors.


(Seminarraum II)

Kategorie: Feldtheorie