Doubly charged scalars, predicted in many models having exotic Higgs representations, can in general have lepton-number violating (LFV) couplings. We show that by using an associated monoenergetic final state photon seen at a future linear e-e- collider, we can have a clear and distinct signature for a doubly-charged resonance. The strength of the Delta L=2 coupling can also be probed quite effectively as a function of the recoil mass of the doubly-charged scalar.
@article{arxiv.hep-ph/0608112,
title = {Associated single photons and doubly charged scalar at linear e-e- colliders},
author = {Biswarup Mukhopadhyaya and Santosh Kumar Rai},
journal= {arXiv preprint arXiv:hep-ph/0608112},
year = {2008}
}