Analysis of BaBar, Belle, BES-II, CLEO and KEDR data on $\psi(3770)$ line shape and determination of the resonance parameters

Understand

The available data on the $D\overline{D}$ and inclusive hadronic cross sections in the $\psi(3770)$ region from the BaBar, Belle, BES-II, CLEO and KEDR experiments have been analyzed assuming that systematic uncertainties on cross sections measured by different detectors are not correlated.

• Four theoretical models predicting the $\psi(3770)$ line shape were considered for the $D\overline{D}$ channel.
• All of them gave satisfactory description of the data.
• The combined analysis of the $D\overline{D}$ and inclusive hadronic channel was performed using the model based on the vector dominance approach and accounting for the contribution of the $\psi(2S)$ tail to the $D\overline{D}$ cross section.