Jun 26 – 29, 2017
Schloss Waldthausen
Europe/Berlin timezone

Measurement of $\Gamma_{ee} * B_{hadrons}$ for J/$\psi$ meson with KEDR detector

Jun 27, 2017, 6:30 PM
1h 30m
Helmholtz-Institut Mainz

Helmholtz-Institut Mainz

Staudingerweg 18, 55128 Mainz
Board: 14


Mrs Tatyana Kharlamova (BINP)


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

Presentation materials