Signals for vector-like leptons in an $S_3$-symmetric 2HDM at ILC

Abstract

In this work, we explore the signals of an $S_3$-symmetric two Higgs doublet model with two generations of vector-like leptons (VLLs) at the proposed International Linear Collider (ILC). The lightest neutral component of the VLL in this model provides a viable dark matter (DM) candidate satisfying the current relic density data as well as circumventing all direct and indirect DM search constraints. Some representative benchmark points have been selected with low, medium and high DM masses, satisfying all theoretical and experimental constraints of the model and constraints coming from the DM sector. The VLLs (both neutral and charged) will be produced in pair leading to multi-lepton and multi-jet final states. We show that the ILC will prove to be a much more efficient and useful machine to hunt for such signals compared to LHC. Using traditional cut-based analysis as well as sophisticated multivariate analysis, we perform a detailed analysis of some promising channels containing mono-lepton plus di-jet, di-lepton, four-lepton and four jets along with missing transverse energy in the final state at 1 TeV ILC.

Minor changes with the previous version, version accepted in European Physics Journal C

References in corpus (14)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Results from a search for dark matter in the complete LUX exposure
• Light custodians in natural composite Higgs models
• micrOMEGAs4.1: two dark matter candidates
• Dark Matter Search Results from the Complete Exposure of the PICO-60 C${}_3$F${}_8$ Bubble Chamber
• Collider Signals of Top Quark Flavor Violation from a Warped Extra Dimension
• Higgs Boson Mass, Sparticle Spectrum and Little Hierarchy Problem in Extended MSSM
• Theory and Phenomenology of Exotic Isosinglet Quarks and Squarks
• Collider Signature of T-quarks
• Testing the Littlest Higgs Model with T-parity at the Large Hadron Collider
• Quark mixing in an $S_3$ symmetric model with two Higgs doublets
• Dark Matter and Collider Searches in $S_3$-Symmetric 2HDM with Vector Like Leptons