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QED Production of Vector Mesons with a Lepton Pair in Electron-Positron Annihilation

The processes e+e- -> V l+l- in which a neutral vector meson is produced purely electromagnetically by photon conversion alongside a lepton pair. The rate is dominated by emission of the meson off the incident electron or positron and is enhanced by a double logarithm of the lepton mass from the triple-collinear limit, giving clean, QED-calculable channels observable at BESIII and Belle II.