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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 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: 2865
2015 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 92, no 11, 112007Article in journal (Refereed) PublishedText
Abstract [en]

A search is presented for pair production of a new heavy quark (Q) that decays into aW 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 root s = 8 TeV collected by the ATLAS detector at the LHC. No evidence of Q (Q) over bar production is observed. New chiral quarks with masses below 690 GeVare 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).

Place, publisher, year, edition, pages
American Physics Society , 2015. Vol. 92, no 11, 112007
Keyword [en]
ELECTROWEAK SYMMETRY-BREAKING, PARTON DISTRIBUTIONS, HADRON COLLIDERS, HIGGS-BOSON, FINAL-STATE, LHC, DYNAMICS
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-181096DOI: 10.1103/PhysRevD.92.112007ISI: 000367070900002ScopusID: 2-s2.0-84953229318OAI: oai:DiVA.org:kth-181096DiVA: diva2:898596
Funder
Knut and Alice Wallenberg FoundationSwedish Research Council
Note

QC 20160128

Available from: 2016-01-28 Created: 2016-01-28 Last updated: 2016-02-05Bibliographically approved

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Lund-Jensen, BengtSidebo, Per EdvinStrandberg, Jonas
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