Possible Single Resonant Production of the Fourth Generation Charged Leptons at $\gamma e$ Colliders

TL;DR

This paper investigates the potential to produce fourth-generation charged leptons via anomalous interactions at future gamma-electron colliders, analyzing signatures, backgrounds, and experimental feasibility.

Contribution

It introduces a study of single resonant production of fourth-generation leptons at gamma-e colliders, focusing on signatures, backgrounds, and detection prospects.

Findings

Identifies signatures of anomalous processes involving fourth-generation leptons.

Determines the minimum luminosities needed for observation.

Estimates the achievable anomalous coupling strengths.

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 $\gamma e\to \ell_4\to e\gamma $ and $\gamma e\to \ell_4\to eZ$ 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.