Electromagnetic transition form factors of light vector mesons

Understand

The decays of narrow light vector mesons into pseudoscalar mesons and dileptons are calculated to leading order in a recently proposed scheme which treats pseudoscalar and vector mesons on equal footing.

• Since all required parameters have been determined by other reactions the presented approach gains predictive power for the considered processes.
• The decay of the $\omega$-meson into pion and dimuon agrees reasonably well with the available experimental data concerning form factor, single-differential decay width and partial decay width.
• As well do the partial decay width of the $\omega$-meson into a pion and a dielectron and of the $\phi$-meson into an $\eta$-meson and a dielectron.