Experimental constraint on the $ρ-$ meson form factors in the time--like region

Abstract

The annihilation reaction $e^++e^-\rightarrow \bar ρ+ρ$ is considered. The constraint on time-like $ρ$-meson form factors from the measurement done by the BaBar collaboration at $\sqrt{s}=10.5$ GeV is analyzed.

10 pages 3 figures