Lagrangian-based model of the $e^{+}{e}^{-}\to V\bar{V}$ process applied to the $e^{+}{e}^{-}\to D^{\ast +}{D}^{\ast -}$ data

Using the quantum field theory, we derive a Breit-Wigner-type formula for the $e^{+}{e}^{-}$ annihilation into a vector meson and its antiparticle, and relate the formula parameters to observable quantities. The formula’s soundness is checked by fitting the $e^{+}{e}^{-}\to D^{\ast +}{D}^{\ast -}$ data published by the BESIII Collaboration in 2022.