Aad, G.Abbott, B.Abdallah, J.Abdinov, O.Aben, R.Abolins, M.Abouzeid, O. S.Izen, Joseph M.Leyton, MichaelMeirose, BernhardNamasivayam, HarisankarReeves, KendallATLAS Collaboration2016-07-062016-07-062015-12-222015-12-221550-7998http://hdl.handle.net/10735.1/4894A search is presented for pair production of a new heavy quark (Q) that decays into a W boson and a light quark (q) in the final state where one W boson decays leptonically (to an electron or muon plus a neutrino) and the other W boson decays hadronically. The analysis is performed using an integrated luminosity of 20.3 fb⁻¹ of pp collisions at √s̅ = 8 TeV collected by the ATLAS detector at the LHC. No evidence of QQ̅ production is observed. New chiral quarks with masses below 690 GeV are excluded at 95% confidence level, assuming BR(Q → Wq) = 1. Results are also interpreted in the context of vectorlike quark models, resulting in the limits on the mass of a vectorlike quark in the two-dimensional plane of BR(Q → Wq) versus BR(Q → Hq).enCC BY 3.0 (Attribution)©2015 CERN, for the ATLAS Collaborationhttp://creativecommons.org/licenses/by/3.0/QuarksW bosonsMuonsJets (Nuclear physics)Transverse momentumAtomic massElectronsLeptons (Nuclear physics)ArticleAad, G., B. Abbott, J. Abdallah, O. Abdinov, et al. 2015. "Search for pair production of a new heavy quark that decays into a W boson and a light quark in pp collisions at √s̅ =8 TeV with the ATLAS detector." Physical Review D - Particles, Fields, Gravitation and Cosmology 92(11), doi:10.1103/PhysRevD.92.112007.9211