Exploring vector-like B-quark pair production at CLIC in fully hadronic final states

We investigate the discovery potential of the 3~TeV 3 TeV Compact Linear Collider (CLIC) for a singlet vector-like bottom partner B decaying via B → tW. B → t W . Focusing on the fully hadronic final state BB̄ → tW\,tW, B B ¯ → t W t W , we reconstruct boosted top and W candidates using large- R Valencia jets, supplemented by a merging strategy for partially resolved decays. A systematic scan of the jet-radius parameter identifies $$R=0.8$$ R = 0.8 as the optimal choice, balancing boosted-jet containment with jet multiplicity. Using a cut-based analysis optimized for the $$(2t+2W)$$ ( 2 t + 2 W ) topology and an integrated luminosity of 5~ab⁻¹, 5 ab - 1 , CLIC can achieve sensitivity to mB 1.5~TeV. m B ≲ 1.5 TeV . These results highlight CLIC’s excellent capability to probe heavy vector-like quarks in high jet multiplicity environments, extending well beyond the reach of current hadron collider searches.