# Search for single vectorlike quarks in ppbar collisions at sqrt(s) = 1.96 TeV

Abstract : We present a search for hypothetical vector-like quarks in ppbar collisions at sqrt(s) = 1.96 TeV. The data were collected by the D0 detector at the Fermilab Tevatron Collider and correspond to an integrated luminosity of 5.4 fb^(-1). We select events with a final state composed of a W or Z boson and a jet consistent with a heavy object decay. We observe no significant excess in comparison to the background prediction and set limits on production cross sections for vector-like quarks decaying to W+jet and Z+jet. Assuming a vector-like quark to standard model quark coupling parameter $\tilde{\ kappa}_{qQ}$ of unity, we exclude vector-like quarks with mass below 693 GeV for decays to W+jet and mass below 449 GeV for decays to Z+jet. These are the most stringent mass limits for electroweak single vector-like quark production at hadron colliders.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00524503
Contributor : Emmanuelle Vernay <>
Submitted on : Friday, October 8, 2010 - 9:18:25 AM
Last modification on : Wednesday, September 16, 2020 - 4:20:31 PM

### Citation

V.M. Abazov, B. Abbott, B.S. Acharya, M. Adams, T. Adams, et al.. Search for single vectorlike quarks in ppbar collisions at sqrt(s) = 1.96 TeV. Physical Review Letters, American Physical Society, 2011, 106, pp.081801. ⟨10.1103/PhysRevLett.106.081801⟩. ⟨in2p3-00524503⟩

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