Single production of vectorlike Y quarks at the HL-LHC

We study single production of vectorlike exotic quark Y with electric charge |Q_{Y}|=4/3 and its subsequent decay at the High Luminosity LHC (HL-LHC). Most of the vector like quark (VLQ) decays have the W bosons in the intermediate state. Besides their direct productions singly or pairs, the electroweak W-bosons are involved in many decay chains as a result of the decay of a top quark which contributes to the background. This is particularly the case since vectorlike Y quark, which is often produced with the highest cross-section, can only decay via a W boson and a down type quark (d,s,b). We calculate the cross sections of signal (for different coupling and mass values) and relevant SM backgrounds. After a fast simulation of signal and background events, estimations of the sensitivity to the parameters (mass range 1000-2500 GeV and coupling value \kappa_{Y}=0.5) have been presented at the HL-LHC with center of mass energy \sqrt{s}=14 TeV and integrated luminosity projections of 300 fb^{-1}, 1000 fb^{-1} and 3000 fb^{-1}.