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  • PhysRevD.92.112007

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Search for pair production of a new heavy quark that decays into a W boson and a light quark in pp collisions at s√=8  TeV with the ATLAS detector

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Article number112007
<mark>Journal publication date</mark>22/12/2015
<mark>Journal</mark>Physical Review D
Issue number11
Volume92
Number of pages28
StatePublished
Original languageEnglish

Abstract

A 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 s√=8  TeV collected by the ATLAS detector at the LHC. No evidence of QQ¯ 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).