Single production of vector-like top partner decaying to $Wb$ in the leptonic channel at $ep$ colliders in the LHT model

Abstract

In the littlest Higgs model with T-parity(LHT), we study the single production of vector-like top partner with the subsequent decay $T_{+}\to Wb$ in the leptonic channel at the $ep$ colliders. Focus on the LHeC ($\sqrt{s}$ = 1.98 TeV) and FCC-eh ($\sqrt{s}$ = 5.29 TeV), we investigate the observability of the single top partner production with the unpolarized and polarized electron beams, respectively. As a result, the statistical significance can be enhanced by the polarized electron beams. Under the current constraints, the search for $T_{+}$ in the $Wb$ channel at the LHeC cannot provide a stronger limit on the top partner mass. By contrast, the search for the $T_{+}$ in this channel at the FCC-eh with polarized $e^{-}$ beams can exclude the top partner mass up to 1350 GeV, 1500 GeV and 1565 GeV with integrated luminosities of 100 fb${}^{-1}$, 1000 fb${}^{-1}$ and 3000 fb${}^{-1}$ at the 2$\sigma$ level, which is an improvement with respect to the current indirect searches and the LHC direct searches. Furthermore, we also give an extrapolation to the high-luminosity LHC with $\sqrt{s}=14$ TeV and $L=3000{\mathrm{fb}}^{-1}$. Our results show that the LHT model is still a natural solution to the shortcomings of the electroweak and scalar sector although it has been constrained severely.

20 pages, 9 figures. This version will be published in Phys.Rev.D

References in corpus (13)

• 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
• PYTHIA 6.4 Physics and Manual
• MadAnalysis 5, a user-friendly framework for collider phenomenology
• Designing and recasting LHC analyses with MadAnalysis 5
• ILC Operating Scenarios
• Phenomenology of Littlest Higgs Model with T-parity: including effects of T-odd fermions
• Constraining Top partner and Naturalness at the LHC and TLEP
• Top Partner Discovery in the $T\to tZ$ channel at the LHC
• Higgs couplings and Naturalness in the littlest Higgs model with T-parity at the LHC and TLEP
• Discovery potential for $T^{\prime }\to tZ$ in the trilepton channel at the LHC
• Little Higgs Dark Matter after PandaX-II/LUX 2016 and LHC Run-1
• HERA Collider Results

Cited by in corpus (7)

• Search for vector-like bottom quark via $Zb$ production at the LHC
• EasyScan_HEP: a tool for connecting programs to scan the parameter space of physics models
• Search for single vector-like $B$ quark production in hadronic final states at the LHC
• Differential distributions for Single Top Quark Production at the LHeC
• Search for the singlet vector-like top quark in the $T\to tZ$ channel with $Z\to \nu \bar{\nu }$ at hadron colliders
• Collinear approach for top quark production at ep colliders
• Phenomenological implications of the new Littlest Higgs model with T-parity