Search for the production of single vector-like and excited quarks in the Wt nal state in pp collisions at √s = 8 TeV with the ATLAS detector Aad, G. Aguilar Saavedra, Juan Antonio Atlas Collaboration, / Exotics Hadron-Hadron scattering A search for vector-like quarks and excited quarks in events containing a top quark and a W boson in the final state is reported here. The search is based on 20.3 fb−1 of proton-proton collision data taken at the LHC at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector. Events with one or two leptons, and one, two or three jets are selected with the additional requirement that at least one jet contains a b-quark. Single-lepton events are also required to contain at least one large-radius jet from the hadronic decay of a high-p T W boson or a top quark. No significant excess over the expected background is observed and upper limits on the cross-section times branching ratio for different vector-like quark and excited-quark model masses are derived. For the excited-quark production and decay to Wt with unit couplings, quarks with masses below 1500 GeV are excluded and coupling-dependent limits are set. 2024-10-16T10:48:02Z 2024-10-16T10:48:02Z 2016-02-17 journal article Aad, G. & Rodríguez Chala, R. & Atlas Collaboration. J. High Energ. Phys. 2016, 110 (2016). [https://doi.org/10.1007/JHEP02(2016)110] https://hdl.handle.net/10481/96016 10.1007/JHEP02(2016)110 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional Springer