The SU(3) L ⊗U(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.

Using a peculiar version of the SU(3) L ⊗ U(1) N electroweak model, we investigate the production of doubly charged Higgs boson at the Large Hadron Collider. Our results include branching ratio calculations for the doubly charged Higgs and for one of the neutral scalar bosons of the model.

The SU(3) L ⊗U(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 neutral SU(3) L ⊗U(1) N Higgs bosons in the e − e + Next Linear Collider (NLC) and in the CERN Linear Collider (CLIC). We compute the branching ratios of two of the SU(3) L ⊗U(1) N neutral Higgs bosons and study the possibility to detect them and the Z ′ extra neutral boson of the model.

VVe study the production of a charged-heavy-lepton pair considering the minimal supersymmetric standard model. ltd'e show that the cross section for the process pp~gg~8 +8 is enhanced for large values of the ratio between the two-Higgs-doublet vacuum expectation values, in comparison with the standard model result. The gluon fusion mechanism is the most important contribution to the lepton pair production for Mg ) 50 GeV.

We investigate the production, backgrounds, and signatures of pairs of charged heavy fermions using the SU(3) L U(1) N electroweak model in e ϩ e Ϫ colliders ͑Next Linear Collider and CERN Linear Collider͒. We also analyze the indirect evidence for a boson ZЈ.

We studied the production and signatures of doubly charged Higgs bosons in the process γe − →a heavy lepton, at the e − e + International Linear Collider (ILC) and CERN Linear Collider (CLIC). The intermediate photons are given by the Weizsäcker-Williams and laser backscattering distributions. We found that significant signatures are obtained by bremsstrahlung and backward Comptom scattering of laser. A clear signal can be obtained for doubly charged Higgs bosons, doubly charged gauge bosons and heavy leptons. PACS numbers: 11.15.Ex: Spontaneous breaking of gauge symmetries, 12.60.Fr: Extensions of electroweak Higgs sector, 14.80.Cp: Non-standard-model Higgs bosons.

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