Heavy Lepton Production with Anomalous Interactions

We consider possible production of heavy leptons via anomalous interactions at future $ep$ colliders (THERA and LHeC), $e^+e^-$ colliders (ILC and CLIC) and $pp$ collider CERN LHC. From the signal and background analysis of heavy leptons we obtained upper mass limits of 650 GeV at LHeC, 450 GeV at ILC and 600 GeV at LHC with optimal choices of relevant parameters.