Search for pair-produced heavy quarks decaying to Wq in the two-lepton channel at (√s)=7 TeV with the ATLAS detector

Barton, Adam and Borissov, Guennadi and Bouhova-Thacker, Eva and Brodbeck, Timothy and Chilingarov, Alexandre and Davidson, Ruth and de Mora, Lee and Dearnaley, William and Fox, Harald and Henderson, Robert and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin and Love, Peter and Ratoff, Peter and Smizanska, Maria and Walder, James (2012) Search for pair-produced heavy quarks decaying to Wq in the two-lepton channel at (√s)=7  TeV with the ATLAS detector. Physical Review D, 86 (1). ISSN 1550-7998

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A search is presented for heavy-quark pair production (QQ¯¯¯) under the decay hypothesis QQ¯¯¯→W+qW−q¯ with q=d, s, b for up-type Q or q=u, c for down-type Q. The search is performed with 1.04  fb−1 of integrated luminosity from pp collisions at s√=7  TeV collected by the ATLAS detector at the CERN LHC. Dilepton final states are selected, requiring large missing transverse momentum and at least two jets. Mass reconstruction of heavy-quark candidates is performed by assuming that the W boson decay products are nearly collinear. The data are in agreement with standard model expectations; a heavy quark with mass less than 350 GeV is excluded at 95% confidence level.

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Journal Article
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Physical Review D
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Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2012 CERN, for the ATLAS Collaboration
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18 Dec 2013 13:55
Last Modified:
05 Jul 2020 03:58