Search for single production of vectorlike top partners through th channel at the HE-LHC and FCC-hh

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2021-07, Vol.81 (7), p.1-9, Article 594
• Main Authors: Tian, Xi-Yan, Du, Liu-Feng, Liu, Yao-Bei
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics and Cosmology; Confidence intervals; Electroweak model; Elementary Particles; Hadrons; Heavy Ions; Large Hadron Collider; Luminosity; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Particle accelerators; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quarks; Regular Article - Theoretical Physics; String Theory
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-021-09385-1

The vectorlike top partners are potential signature of some new physics beyond the Standard Model at the TeV scale. In this paper, we propose to search for the vectorlike T quark with charge 2/3 in the framework of a simplified model where the top partners only couples with the third generation of Standard Model quarks. We investigate the observability for electroweak production of a vectorlike T quark in association with a standard model bottom quark through the process p p → T b ¯ j with the subsequent decay mode of T → t ( → b W + → b ℓ + ν ℓ ) h ( → γ γ ) , at the proposed High Energy Large Hadron Collider (HE-LHC) and Future Circular Collider in hadron-hadron mode (FCC-hh) including the realistic detector effects. The 95% confidence level excluded regions and the 5 σ discovery reach in the parameter plane of κ T - m T , are respectively obtained at the HE-LHC with the integrated luminosity of 15 ab - 1 and the FCC-hh with the integrated luminosity of 30 ab - 1 . We also analyze the projected sensitivity in terms of the production cross section times branching fraction at the HE-LHC and FCC-hh.