Pair production of charged scalars and lepton flavor violating signals in the littlest Higgs model at e+e−e+e− colliders

In this work pair productions of charged and doubly charged scalars in the framework of littlest Higgs model at e+e−e+e− colliders are studied. In the allowed parameter space of the littlest Higgs model, the production rates of the scalar pairs are calculated. It is obtained that pair productions of charged and doubly charged scalars are reachable at e+e−e+e− colliders with energy S⩾1.7 TeV. Using the lepton flavor violating decays of charged scalars calculated in literature, final state analysis is done for pair production processes. This analysis show that depending on the model parameters, lepton number and lepton flavor violations can be observed free from any backgrounds.