Single production of singlet vector-like leptons at the ILC

Abstract Vector-like leptons (VLLs), as one kind of interesting new particle, can produce a rich phenomenology in low- and high-energy experiments. In the framework of the singlet vector-like lepton with scalar (VLS) model, we investigate the discovery potential of the VLL via its single production at the International Linear Collider (ILC) with a center of mass energy <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msqrt> <mml:mrow> <mml:mi>s</mml:mi> </mml:mrow> </mml:msqrt> <mml:mo>=</mml:mo> </mml:math> 1 TeV and an integrated luminosity <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi class="MJX-tex-calligraphic" mathvariant="script">L</mml:mi> </mml:math> = 1 ab −1 , taking into account the appropriate polarization. For the signal and standard model (SM) background analysis, we have considered two kinds of decay channels for the W boson, i.e. pure leptonic and fully hadronic decay channels. Our analytic results show that the parameter space M F ∈ [300, 675] GeV and κ ∈ [0.0294, 0.1] might be detected by the proposed ILC for a pure leptonic decay channel. For a fully hadronic decay channel, a larger detection region of the parameter space isderived as M F ∈ [300, 700] GeV and κ ∈ [0.0264, 0.0941].