Aad, G.G.AadAbbott, B.B.AbbottAbbott, D. C.D. C.AbbottAbed Abud, A.A.Abed AbudAbeling, K.K.AbelingAbhayasinghe, D. K.D. K.AbhayasingheAbidi, S. H.S. H.AbidiAbramowicz, H.H.AbramowiczAbreu, H.H.AbreuZwalinski, L.L.Zwalinski2023-12-182023-12-182023-11-23Journal of High Energy Physics. 2023 Nov 23;2023(11):168https://resolver.sub.uni-goettingen.de/purl?gro-2/139414A search is presented for single production of a vector-like B quark decaying into a Standard Model b-quark and a Standard Model Higgs boson, which decays into a $ b\overline{b} $ pair. The search is carried out in 139 fb−1 of $ \sqrt{s} $ = 13 TeV proton-proton collision data collected by the ATLAS detector at the LHC between 2015 and 2018. No significant deviation from the Standard Model background prediction is observed, and mass-dependent exclusion limits at the 95% confidence level are set on the resonance production cross-section in several theoretical scenarios determined by the couplings cW, cZ and cH between the B quark and the Standard Model W, Z and Higgs bosons, respectively. For a vector-like B occurring as an isospin singlet, the search excludes values of cW greater than 0.45 for a B resonance mass (mB) between 1.0 and 1.2 TeV. For 1.2 TeV < mB < 2.0 TeV, cW values larger than 0.50–0.65 are excluded. If the B occurs as part of a (B, Y) doublet, the smallest excluded cZ coupling values range between 0.3 and 0.5 across the investigated resonance mass range 1.0 TeV < mB < 2.0 TeV.enCC BY 4.0Vector-Like QuarksBeyond Standard ModelExoticsHadron-Hadron Scatteringjournal_article10.1007/JHEP11(2023)1682023-12-17The Author(s)