Speaker
Mrs
Tatyana Kharlamova
(BINP)
Description
We report a new precise measurement J/$\psi$ meson leptonic width performed with the KEDR detector at the VEPP-4M $e^+e^-$ collider. Cross sections for the processes $e^+e^-\to hadrons$ and $e^+e^- \to e^+e^-$ were measured at J/$\psi$ resonance energy range and $\Gamma_{ee}*B_{hadrons}$(J/$\psi$) value was obtained with accuracy about 2%. Leptonic and total widths were calculated, using the table values of the leptonic branching ratios.
Primary author
Mrs
Tatyana Kharlamova
(BINP)
