Search For The Singlet Vectorlike Lepton In Semileptonic Channel At Future E(+)E(-) Colliders

In the framework of singlet vectorlike lepton (VLL) model, we study a search for VLL in the semileptonic channel at high energy e(+)e(-) colliders. According to the different decay modes of the electroweak gauge bosons, we divide the signal into two modes, that is mode A and mode B. We performed a detailed detector simulation and displayed the excluding and discovering capability of VLL at different colliders. Compared to the mode B, we find that it is more promising to exclude and discover the VLL in mode A.