Discovery potential for doubly charged Higgs bosons in e+e− collisions at LEP

We study the discovery limits for doubly charged Higgs bosons, Δ−−, obtainable at the LEP e+e− collider. We expect that the LEP2 collaborations can rule out the existence of a doubly charged Higgs boson of mass below about 190 GeV for Yukawa couplings greater than 0.1. However, even for larger values of MΔ, evidence for the Δ can be seen due to contributions from virtual intermediate Δʹs provided they have relatively large values of the Yukawa couplings.