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 Δ's provided they have relatively large values of the Yukawa couplings.

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Persistent URL dx.doi.org/10.1016/S0370-2693(02)02621-7
Journal Physics Letters B
Godfrey, S, Kalyniak, P. (Pat), & Romanenko, N. (Nikolai). (2002). Discovery potential for doubly charged Higgs bosons in e+e- collisions at LEP. Physics Letters B, 545(3-4), 361–366. doi:10.1016/S0370-2693(02)02621-7