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  • PhysRevD.92.112007

    Rights statement: This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2015 CERN, for the ATLAS Collaboration

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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
Publication StatusPublished
<mark>Original language</mark>English

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).