Probing doubly charged Higgs in $e^+ e^-$ Colliders in 3-3-1 Model
  The SU(3)$_L\otimesU(1)_N$ electroweak model predicts new Higgs bosons beyond the one of the standard model. In this work we investigate the signature and production of doubly charged Higgs bosons in the $e^-e^+$ International Linear Collider and in the CERN Linear Collider. We compute the branching ratios for the doubly charged gauge bosons of the model. 
J. E. Cieza Montalvo, Nelson V. Cortez, M. D. Tonasse