Single production of doubly charged Higgs bosons at hadron colliders

We reconsider the single production of the doubly charged Higgs bosons ΔR++ and ΔL++ at the LHC and TEVATRON in the framework of the left–right symmetric model and the Higgs triplet model. We show that in the left–right symmetric model the production of ΔR++ by Drell–Yan process via WR exchange may give the dominant contribution. The same channel for the production of ΔL++ in the Higgs triplet model is insignificant.