Measurement of the branching fraction of $D_s^{\ast +}\to e^{+}{e}^{-}{D}_s^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +684

The branching fraction of the electromagnetic Dalitz decay $D_s^{\ast +}\to e^{+}{e}^{-}{D}_s^{+}$ is measured with an $e^{+}{e}^{-}$ collision data sample collected by the BESIII experi…