Description of the ψ(3770) resonance interfering with the background

Abstract

The parameters of the interfering $\psi (3770)$ resonance should be determined from the data on the reactions $e^{+}{e}^{-}$\,$\to$\,$D\bar{D}$ with the use of the models satisfying the elastic unitarity requirement. The selection of such models can be realized by comparing their predictions with the relevant data on the shape of the $\psi (3770)$ peak in the non-$D\bar{D}$ decay channels. Here, we illustrate this unitarity approach by the example of the most simple variant of the model of the mixed $\psi (3770)$ and $\psi (2S)$ resonances. When new high-statistics data become available, it will be interesting to test this clarity variant.

5 pages, 4 figures; v2: matches published version in Phys. Rev. D

References in corpus (7)

• Heavy quarkonium: progress, puzzles, and opportunities
• Measurement of the near-threshold $e^{+}{e}^{-}\to D\bar{D}$ cross section using initial-state radiation
• 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
• Measurement of ψ(3770) parameters
• 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
• Electromagnetic form factor of pion in the field theory inspired approach
• Line shape of ψ(3770) in e^+e^-\to D\bar D

Cited by in corpus (5)

• Exclusive open-charm near-threshold cross sections in a coupled-channel approach
• Line-shape and poles of the $\psi (3770)$
• The $\psi$(3770) resonance and its production in $\bar{p}p\to D\bar{D}$
• Electronic width of the $\psi (3770)$ resonance interfering with the background
• The $R_{uds}$ value in the vicinity of $\psi (3770)$ state