Line shape of ψ(3770) in e^+e^-\to D\bar D

Abstract

Interference phenomena observed in the $\psi (3770)$ resonance region in the reactions $e^{+}{e}^{-}$ $\to$ $D\bar{D}$ are analyzed. To avoid ambiguities in the determination of the $\psi (3770)$ resonance parameters, when analyzing data between the $D\bar{D}$ and $D\bar{D}\pi$ thresholds, the amplitudes satisfying the elastic unitarity requirement should be used. In the lack of information on the $P$ wave of $D\bar{D}$ elastic scattering, the $\psi (3770)$ parameters, determined by fitting the $e^{+}{e}^{-}$ $\to$ $D\bar{D}$ data, can essentially depend on the model used for the total contribution of the resonance and background. The selection of the models can be toughened by comparing their predictions with the relevant data on the shape of the $\psi (3770)$ peak in the non-$D\bar{D}$ channels $e^{+}{e}^{-}$ $\to$ $\gamma {\chi }_{c0}$, $J/\psi \eta$, $\varphi \eta$, etc.

9 pages, 10 figures; v2: matches published version in Phys.Rev.D

References in corpus (8)

• Measurement of the near-threshold $e^{+}{e}^{-}\to D\bar{D}$ cross section using initial-state radiation
• Measurements of the cross sections for $e^{+}{e}^{-}\to \mathrm{hadrons}$ at 3.650, 3.6648, 3.773 GeV and the branching fraction for $\psi (3770)\to \mathrm{non}-D\bar{D}$
• 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
• Precison Measurements of the Mass, the Widths of $\psi (3770)$ Resonance and the Cross Section $\sigma [e^{+}{e}^{-}\to \psi (3770)]$ at $E_{\mathrm{cm}}=3.7724$ GeV
• Measurement of ψ(3770) parameters
• Electromagnetic form factor of pion in the field theory inspired approach
• The continuum and interference effect in $e^{+}{e}^{-}\to D^0{\bar{D}}^0,D^{+}{D}^{-}$ processes

Cited by in corpus (13)

• Observation of a neutral charmoniumlike state $Z_c(4025{)}^0$ in $e^{+}{e}^{-}\to (D^{\ast }{\bar{D}}^{\ast }{)}^0{\pi }^0$
• Exclusive open-charm near-threshold cross sections in a coupled-channel approach
• $P$-wave coupled channel effects in electron-positron annihilation
• Line-shape and poles of the $\psi (3770)$
• $\bar{p}p$ annihilation into $\bar{D}D$ meson pair within an effective Lagrangian model
• Analysis of BaBar, Belle, BES-II, CLEO and KEDR data on $\psi (3770)$ line shape and determination of the resonance parameters
• Can the $\psi (4040)$ explain the peak associated with $Y(4008)$?
• Description of the ψ(3770) resonance interfering with the background
• The $\psi$(3770) resonance and its production in $\bar{p}p\to D\bar{D}$
• The cross section of the process $e^{+}{e}^{-}\to p\bar{p}$ in the vicinity of charmonium $\psi (3770)$ including three-gluon and $D$-meson loop contributions
• Electronic width of the $\psi (3770)$ resonance interfering with the background
• The $R_{uds}$ value in the vicinity of $\psi (3770)$ state
• Combined heavy-quark symmetry and large-$N_c$ operator analysis for 2-body counterterms in the chiral Lagrangian with $D$ mesons and charmed baryons