True muonium resonant production at $e^{+}{e}^{-}$ colliders with standard crossing angle

Ruben Gargiulo, Elisa Di Meco, Daniele Paesani +3

True muonium (${\mu }^{+}{\mu }^{-}$) is the heaviest and smallest bound state not involving quantum chromodynamics, after true tauonium (${\tau }^{+}{\tau }^{-}$) and mu-tauonium (${\mu }^{\pm }{\tau }^{\mp }$). Unlike atoms c…