The continuum and interference effect in $e^{+}{e}^{-}\to D^0{\bar{D}}^0,D^{+}{D}^{-}$ processes

Abstract

In the $e^{+}{e}^{-}$ annihilation processes $e^{+}{e}^{-}\to D^0{\bar{D}}^0,D^{+}{D}^{-}$ near or above the threshold of $D\bar{D}$, there are not only the resonance contribution $e^{+}{e}^{-}\to \psi (3770)\to D^0{\bar{D}}^0,D^{+}{D}^{-}$, but also the continuum contribution through virtual photon directly $e^{+}{e}^{-}\to {\gamma }^{\ast }\to D^0{\bar{D}}^0,D^{+}{D}^{-}$. The amplitudes through virtual photon directly and through resonance can interfere seriously. We consider the continuum and interference effect in the $D\bar{D}$ production process in $e^{+}{e}^{-}$ annihilation. We find that the effect is significant near and above the threshold of the $D\bar{D}$ mesons.

4 pages, 5 figures, some discussion and one figure added

References in corpus (11)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Observation of psi(3770)--> pi pi J/psi and Measurement of Gamma_{ee}[psi(2S)]
• Measurement of sigma(e^+e^- --> psi(3770) --> hadrons) at E_{cm}=3773 MeV
• Observation of B+ -> psi(3770) K+
• First Observation of psi(3770) --> gamma chi_{c1} --> gamma gamma J/psi
• Measurement of Cross Sections for $D^0{\bar{D}}^0$ and $D^{+}{D}^{-}$ Production in $e^{+}{e}^{-}$ Annihilation at $\sqrt{s}=3.773$ GeV
• Experimental Limits on Weak Annihilation Contributions to b -->u ell nu Decay
• Possible large branching fraction of psi(3770) decays to charmless final states
• The Form Factors of omega pi0 and pi+ pi- at psi(2S)
• Tests for the asymptotic behaviour of the gamma^* --> gamma pi^0 form factor

Cited by in corpus (7)

• The lineshape of $\psi (3770)$ and low-lying vector charmonium resonance parameters in $e^{+}{e}^{-}\to D\bar{D}$
• $D\bar{D}$ production and their interactions
• Measurement of main parameters of the ψ(2S) resonance
• Line shape of ψ(3770) in e^+e^-\to D\bar D
• Study of the branching ratio of $\psi (3770)\to D\bar{D}$ in $e^{+}{e}^{-}\to D\bar{D}$ scattering
• Electronic width of the $\psi (3770)$ resonance interfering with the background
• Light hadron, Charmonium(-like) and Bottomonium(-like) states