Searching for weak singlet charged scalar at lepton colliders

Understand

A weak singlet charged scalar exists in many new physics models beyond the Standard Model.

• The discovery potential of the singlet charged scalar is explored at future lepton colliders, e.g.
• the CEPC, ILC-350 and ILC-500.
• We demonstrate that one can discover the singlet charged scalar up to 118 GeV at the CEPC with an integrated luminosity of $5~\mathrm{ab}^{-1}$.