The Form Factors of omega pi0 and pi+ pi- at psi(2S)

Abstract

The measurements of psi(2S) -> omega pi0 and psi(2S) -> pi+ pi- in e+e- experiments are examined. It is found that the non-resonance virtual photon annihilation gives large contributions to the observed cross sections of these two processes. By including this contribution, the form factors and branching fractions of these two decay modes are revised.

6 pages, 1 figures(two diagrams), Phys. Lett. B557 (2003) 192-197

References in corpus (2)

• A Measurement of Psi(2S) Resonance Parameters
• Recent BES charmonium results

Cited by in corpus (14)

• Observation of 1^-0^- Final States from psi(2S) Decays and e^+e^- Annihilation
• Measurements of $\psi (2S)$ decays into Vector- Tensor final states
• Measurement of the final states $\omega {\pi }^0$, $\rho \eta$, and $\rho {\eta }^{{}^{\prime }}$ from $\psip$ electromagnetic decays and $\ee$ annihilations
• Measuring psi(3770) --> rho pi in e+e- experiment
• Possible large phase in psi(2S) -> 1-0- Decays
• The interference between virtual photon and 1-- charmonium in e+e-experiment
• Relative phase between strong and electromagnetic amplitudes in psi(2S) to 0- 0- decays
• Measurement of Interference between Electromagnetic and Strong Amplitudes in psi(2S) Decays to Two Pseudoscalar Mesons
• Observation of the Exclusive Reaction e+e- -> phi eta at sqrt{s}=10.58 GeV
• Measurements of J/psi Decays into 2(pi+pi-)eta and 3(pi+pi-)eta
• The continuum and interference effect in $e^{+}{e}^{-}\to D^0{\bar{D}}^0,D^{+}{D}^{-}$ processes
• Measurement of the branching fractions of psi(2S) -> 3(pi+pi-) and J/psi -> 2(pi+pi-)
• Data taking strategy for the phase study in ${\psi }^{\prime }\to K^{+}{K}^{-}$
• Fast computation of observed cross section for ${\psi }^{\prime }\to PP$ decays