Production of the Doubly Charged Leptons at the High-Energy Lineare+e−colliders

We consider production of the doubly charged leptons X-+/-+/- via e(+)e(-), gamma gamma and e gamma collisions at the high-energy linear e(+)e(-) colliders. It is found that, due to the smallness of the mixing parameter v(e), the production cross section for the subprocess e gamma -> X--W+ is too small to be used to study the possible signatures of the doubly charged leptons. However, the processes e(+)e(-) -> (X--) over barX(--) and gamma gamma -> (X--) over barX(--), are not this case. As long as the doubly charged leptons are not too heavy, they can be abundantly produced via these two processes at the high-energy linear e(+)e(-) colliders.