Search for single production of vector-like B quark via bZ channel at the HL-LHC

Abstract

In this work, we propose to search for the doublet vectorlike B quark (VLQ-B) based on a model-independent framework, where the VLQ-B only couples with the third generation of Standard Model quarks. We investigate the observability for single electroweak production process pp→Bb¯j with the subsequent decay mode of B→bZ and Z→ℓ+ℓ−(ℓ=e,μ) at the future high-luminosity Large Hadron Collider (HL-LHC). After a fast simulation of signal and background events, the 95% confidence level excluded regions and the 5σ discovery reach in the parameter plane of κB−mB, are respectively obtained in the narrow width case. The projected sensitivity in terms of the production cross section times branching fraction is also predicted with 10% systematic uncertainty.