Effects of heavy unconventional scalars in leptonic interactions

The contributions of virtual scalars in e⁺{e}^{{{-}}}→{{μ}}⁺μ^-, e⁺{e}^{{{-}}}→{e}⁺e^-, muon decays, and νₑ^(-)+e^-{→}νₑ^(-)e- scattering are derived to obtain constraints on Yukawa couplings and masses of these scalars. Implications for anomalous e⁺{e}^{{{-}}}${γ} events in the pp{} collider are also discussed.