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

Abstract

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. The following values of the mass, total width, electron width and decay probability to the non-$D\overline{D}$ states were obtained: $M=3779.8\pm 0.6\text{MeV},\Gamma =25.8\pm 1.3\text{MeV},{\Gamma }_{ee}=196\pm 18\text{eV},{\mathcal{B}}_{nD\overline{D}}=0.164\pm 0.049$, where the errors quoted include both statistical and dominant systematic uncertainties.

References in corpus (4)

• Measurements of the braching fractions for psi(3770)--> D0D0-bar,D+D-,DD-bar$ and the resonance parameters of psi(3770) and psi(2S)
• Measurements of the continuum $R_{\mathrm{uds}}$ and $R$ values in $e^{+}{e}^{-}$ annihilation in the energy region between 3.650 and 3.872 GeV
• $P$-wave coupled channel effects in electron-positron annihilation
• Updated measurements of absolute $D^{+}$ and $D^0$ hadronic branching fractions and $\sigma (e^{+}{e}^{-}\to D\overline{D})$ at $E_{\mathrm{cm}}=3774$ MeV

Cited by in corpus (6)

• Near-threshold $D\bar{D}$ spectroscopy and observation of a new charmonium state
• Line-shape and poles of the $\psi (3770)$
• Wave-Packet Effects: A Solution for Isospin Anomalies in Vector-Meson Decay
• Resonance parameters of the vector charmoniumlike state $G(3900)$
• Electronic width of the $\psi (3770)$ resonance interfering with the background
• Hadronic decay of vector charmonium from the lattice