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Search for the production of single vector-like and excited quarks in the Wt final state in pp collisions at √s =TeV with the ATLAS detector

Author(s)
Taylor, Frank E
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Abstract
A search for vector-like quarks and excited quarks in events containing a top quark and a W boson in the final state is reported here. The search is based on 20.3 fb[superscript −1] of proton-proton collision data taken at the LHC at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector. Events with one or two leptons, and one, two or three jets are selected with the additional requirement that at least one jet contains a b-quark. Single-lepton events are also required to contain at least one large-radius jet from the hadronic decay of a high-pTW boson or a top quark. No significant excess over the expected background is observed and upper limits on the cross-section times branching ratio for different vector-like quark and excited-quark model masses are derived. For the excited-quark production and decay to Wt with unit couplings, quarks with masses below 1500 GeV are excluded and coupling-dependent limits are set.
Date issued
2016-02
URI
http://hdl.handle.net/1721.1/107725
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag/SISSA
Citation
The ATLAS collaboration et al. “Search for the Production of Single Vector-like and Excited Quarks in the Wt Final State in Pp Collisions at √S = 8 TeV with the ATLAS Detector.” Journal of High Energy Physics 2016.2 (2016): n. pag.
Version: Final published version
ISSN
1029-8479
1126-6708

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