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Search for the production of single vector-like and excited quarks in the Wt final state in pp collisions at root s=8 TeV with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 2870
2016 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, Vol. 2, no 10Article in journal (Refereed) PublishedText
Abstract [en]

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(-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-PT W 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.

Place, publisher, year, edition, pages
Springer, 2016. Vol. 2, no 10
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-188612DOI: 10.1007/JHEP02(2016)110ISI: 000375282900001ScopusID: 2-s2.0-8495934433OAI: oai:DiVA.org:kth-188612DiVA: diva2:937361
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note

QC 20160615

Available from: 2016-06-15 Created: 2016-06-15 Last updated: 2016-06-15Bibliographically approved

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Lund-Jensen, BengtSidebo, EdvinStrandberg, Jonas
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