Speaker
Description
I will present the collider phenomenology of a vector-like top partner (VLT) within the Type-II Two-Higgs-Doublet Model (2HDM-II) extended by a vector-like quark doublet. The study focuses on final states involving a charged Higgs boson. In this framework, the VLT predominantly decays through exotic channels, leading to signatures with high $b$-jet multiplicity and leptonic components. The analysis is based on Monte Carlo simulations of VLT pair production at the 14 TeV LHC, considering both fully hadronic and semi-leptonic final states. The discovery prospects are motivated by results showing that for $m_{H^\pm}=600$ GeV, a 5$\sigma$ sensitivity can be achieved for $m_T$ up to about 1.3 TeV at 300 fb⁻¹, extending to around 1.5 TeV at higher luminosities. The study further examines how the reach depends on the charged Higgs mass, luminosity, and systematic uncertainties.
These results build upon our recent works: Phys. Rev. D 109 (2024) 055016, Phys. Rev. D 111 (2025) 095026, Eur. Phys. J. C 85 (2025) 2, and Eur. Phys. J. C 85 (2025) 500.
