STUDY OF ρ AND ω MESON CONVERSION DECAYS WITH THE CMD-2 DETECTOR AT THE VEPP-2M COLLIDER

Abstract

In 2000 a large statistical sample of about 3.4 pb -1 was collected in the 720—840 MeV c.m. energy range with the CMD-2 detector at the VEPP-2M collider. It corresponds to 1.8·106ω meson decays. This data sample was used to study the ρ and ω meson conversion decays. The measured branching fraction for the ω→π0e+e- decay mode agrees with the previous result of the ND detector but has about two times better accuracy. Upper limits for the decay modes ρ→π0e+e- and ρ,ω→ηe+e- were set for the first time.