Studies of ρ-Meson Decay by the Transition Potential ${\rm V}_{q\hbox{-}qq\bar q}$ of a Quark-Antiquark Pair Creatior Model

Decay rate of ρ-meson into two π-mesons was calculated by using the transition potential of a quark-antiquark pair creation model. The theoretical result is in good agreement with the experimental data. Also, the difference of decay widths for processes ρ±→π±π0 and ρ0→π+π- was discussed.