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Search for heavy vector-like quarks coupling to light quarks in proton-proton collisions at √s=7 TeV with the ATLAS detector*

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This Letter presents a search for singly produced vector-like quarks, Q, coupling to light quarks, q. The search is sensitive to both charged current (CC) and neutral current (NC) processes, pp→Qq→Wqq′ and pp→Qq→Zqq′ with a leptonic decay of the vector gauge boson. In 1.04 fb−1 of data taken in 2011...

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Main Authors: Aad, Georges (Author) , Anders, Christoph (Author) , Andrei, George Victor (Author) , Childers, J. Taylor (Author) , Dietzsch, Thorsten (Author) , Geweniger, Christoph (Author) , Hanke, Paul (Author) , Henke, Michael (Author) , Khomich, Andrei (Author) , Kluge, Eike-Erik (Author) , Kugel, Andreas (Author) , Lendermann, Victor (Author) , Männer, Reinhard (Author) , Meier, Karlheinz (Author) , Müller, Felix (Author) , Poddar, Sahill (Author) , Radescu, Voica (Author) , Schätzel, Sebastian (Author) , Scharf, Veit (Author) , Schöning, André (Author) , Schroer, Nicolai (Author) , Schultz-Coulon, Hans-Christian (Author) , Stamen, Rainer (Author) , Wessels, Martin (Author) , Davygora, Yuriy (Author)
Corporate Author: ATLAS Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 2 April 2012
In: Physics letters
Year: 2012, Volume: 712, Issue: 1, Pages: 22-39
ISSN:1873-2445
DOI:10.1016/j.physletb.2012.03.082
Online Access:Verlag, Volltext: http://dx.doi.org/10.1016/j.physletb.2012.03.082
Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0370269312003802
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Author Notes:ATLAS Collaboration*
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Summary:This Letter presents a search for singly produced vector-like quarks, Q, coupling to light quarks, q. The search is sensitive to both charged current (CC) and neutral current (NC) processes, pp→Qq→Wqq′ and pp→Qq→Zqq′ with a leptonic decay of the vector gauge boson. In 1.04 fb−1 of data taken in 2011 by the ATLAS experiment at a center-of-mass energy s=7 TeV, no evidence of such heavy vector-like quarks is observed above the expected Standard Model background. Limits on the heavy vector-like quark production cross section times branching ratio as a function of mass mQ are obtained. For a coupling κqQ=v/mQ, where v is the Higgs vacuum expectation value, 95% C.L. lower limits on the mass of a vector-like quark are set at 900 GeV and 760 GeV from CC and NC processes, respectively.
Item Description:ATLAS Collaboration: G. Aad, C.F. Anders, V. Andrei, J.T. Childers, Y. Davygora, T.A. Dietzsch, C. Geweniger, P. Hanke, M. Henke, A. Khomich, E.-E. Kluge, A. Kugel, V. Lendermann, R. Maenner, K. Meier, F. Mueller, S. Poddar, V. Radescu, S. Schaetzel, V. Scharf, A. Schöning, N. Schroer, H.-C. Schultz-Coulon, R. Stamen, M. Wessels [und weitere]
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Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2012.03.082

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