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

Barton, Adam and Beattie, Michael and Borissov, Guennadi and Bouhova-Thacker, Evelina Vassileva and Dearnaley, William and Fox, Harald and Grimm, Kathryn Ann Tschann and Henderson, Robert Charles William and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin Eamonn and Love, Peter Allan and Maddocks, Harvey and Skinner, Malcolm and Smizanska, Maria and Walder, James William and Wharton, Andy (2015) 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. Physical Review D, 92 (11). ISSN 1550-7998

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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).

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
ID Code:
78060
Deposited By:
Deposited On:
29 Jan 2016 11:38
Refereed?:
Yes
Published?:
Published
Last Modified:
27 May 2020 04:22