The signatures of doubly charged leptons in future linear colliders

Abstract

We discuss the production of the doubly charged leptons in future linear electron positron colliders, such as the International Linear Collider and Compact Linear Collider. Such states are introduced in extended weak-isospin multiplets by composite models. We discuss the production cross section of $e^{-}\gamma \to L^{--}{W}^{+}$ and carry out analyses for hadronic, semi-leptonic and pure leptonic channels based on the full simulation performance of the Silicon Detector. The 3- and 5-sigma statistical significance exclusion curves are provided in the model parameter space. It is found that the hadronic channel could offer the most possible detectable signature.

20 pages,7 figures

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• Same-Sign Tetralepton Signature at Large Hadron Collider, and future $pp$ Collider
• Search for invisible dark photon in $\gamma e$ scattering at future lepton colliders
• Alternative signatures of the quintuplet fermions at the LHC and future linear colliders