Four-lepton decays of neutral vector mesons

Wen Chen, Yu Jia, Zhewen Mo +2

We investigate the rare electromagnetic decays of neutral vector mesons (exemplified by $J/\psi$, ${\rm Y}$, ${\rho }^0$, $\omega ,\varphi$, \ldots) into four charged leptons ($2(e^{+}{e}^{-})$, $2({\mu }^{+}{\mu }^{-})$, $2(τ^…