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Article
Report number arXiv:1812.07343 ; CERN-EP-2018-226
Title Search for single production of vector-like quarks decaying into Wb in pp collisions at s=13 TeV with the ATLAS detector
Author(s) ATLAS Collaboration  Pokaż wszystkich 2932 autorów
Publication 2019-05-27
Imprint 18 Dec 2018
Number of pages 56
Note 56 pages in total, author list starting page 40, 9 figures, 7 tables, submitted to JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2016-17
In: JHEP 05 (2019) 164
DOI 10.1007/JHEP05(2019)164
Subject category Particle Physics - Experiment ; hep-ex
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords exotics ; particle and resonance production ; experimental results
Abstract A search for singly produced vector-like quarks Q, where Q can be either a T quark with charge +2/3 or a Y quark with charge 4/3, is performed in proton-proton collision data at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 36.1fb1, recorded with the ATLAS detector at the LHC in 2015 and 2016. The analysis targets QWb decays where the W boson decays leptonically. No significant deviation from the expected Standard Model background is observed. Upper limits are set on the QWb coupling strength and the mixing between the Standard Model sector and a singlet T quark or a Y quark from a (B,Y) doublet or a (T,B,Y) triplet, taking into account the interference effects with the Standard Model background. The upper limits set on the mixing angle are as small as |sinθL|=0.18 for a singlet T quark of mass 800 GeV, |sinθR|=0.17 for a Y quark of mass 800 GeV in a (B,Y) doublet model and |sinθL|=0.16 for a Y quark of mass 800 GeV in a (T,B,Y) triplet model. Within a (B,Y) doublet model, the limits set on the mixing parameter |sinθR| are comparable with the exclusion limits from electroweak precision observables in the mass range between about 900 GeV and 1250 GeV.
Related document supersedes: ATLAS-CONF-2016-072
Copyright/License publication: (License: CC-BY-4.0)
Preprint: © 2018-2025 CERN (License: CC-BY-4.0)



Corresponding record in: Inspire
Email contact: zhiqing.philippe.zhang@cern.ch


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