VLQ searches and hadronic final states in the ATLAS experiment

Several models which go beyond the Standard Model (BSM) predict the existence of Vector-like quarks (VLQs). One such class of models, known as Composite Higgs Models (CHMs), attempts to reduce the fine-tuning of the mass of the Higgs boson. This document presents a selection of searches for such VLQs in the context of minimal CHMs, in final states with jets. No significant excesses were seen. However, the current lower bounds on the mass of different types of vector-like quarks which may arise as a singlet or as a part of a doublet extend upto about 2 TeV.