Possible Single Resonant Production of the Fourth Generation Charged Leptons at $γe$ Colliders

Abstract

Single resonant productions of the fourth standard model generation charged lepton via anomalous interactions at gamma e colliders based on future linear e^+ e^- colliders with 500 GeV and 1 TeV center of mass energies are studied. Signatures of $γe\to \ell_4\to eγ$ and $γe\to \ell_4\to eZ$ anomalous processes followed by the hadronic and leptonic decay of the Z boson and corresponding standard model backgrounds are discussed in details. The lowest necessary luminosities to observe these processes and the achievable values of the anomalous coupling strengths are determined.

9 pages, 6 figures, 4 tables