Amplitude analysis of e+e−→VP with the CLEO measurements

With the measured cross sections for e+e−→vector-pseudoscalar (VP) at s=3.773 GeV and s=3.671 GeV by the CLEO Collaboration, we perform a global amplitude analysis to study the possible interference effects between the continuum process via virtual photon and the ψ(3770) resonance decay. It is found that such interference may significantly affect the measurement of the ψ(3770)→exclusive non-DD¯ decays. By taking the interference into account, we extract the branching fraction for ψ(3770)→ρπ.