t-channel production of heavy charged leptons - art. no. 053001

We study the pair production of heavy charged exotic leprons at e(+)e(-) co lliders in the SU(2)(L) x SU(2)(1) X U(1)(Y) model. This gauge group is a s ubgroup of the grand unification group E-6; SU(2)(1) commutes with the elec tric charge operator, and the three corresponding gauge bosons are electric ally neutral. In addition to the standard gamma and Z boson contributions, we also include the contributions from extra neutral gauge bosons. A t-chan nel contribution due to W-1-boson exchange, which is unsuppressed by mixing angles, is quite important. We calculate the left-right and forward-backwa rd asymmetries, and discuss how to differentiate different models.