A search for t[bar over t] resonances with the ATLAS detector in 2.05 fb[superscript −1] of proton-proton collisions at s√=7 TeV
Name
A search for.pdf
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1.48 MB
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Checksum (MD5)
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Author(s)
Taylor, Frank E
Alternative Title
A search for tt¯ resonances with the ATLAS detector in 2.05 fb−1 of proton-proton collisions at s√=7 TeV
Date Issued
July 2012
Journal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
The ATLAS Collaboration et al. “A Search for t[bar over t] Resonances with the ATLAS Detector in 2.05 fb[superscript −1] of Proton-Proton Collisions at √s=7 TeV.” The European Physical Journal C 72.7 (2012): n. pag. © 2012 CERN for the benefit of the ATLAS collaboration
Version
Final published version
Abstract
A search for top quark pair resonances in final states containing at least one electron or muon has been performed with the ATLAS experiment at the CERN Large Hadron Collider. The search uses a data sample corresponding to an integrated luminosity of 2.05 fb[superscript −1], which was recorded in 2011 at a proton-proton centre-of-mass energy of 7 TeV. No evidence for a resonance is found and limits are set on the production cross-section times branching ratio to t[bar over t] for narrow and wide resonances. For narrow Z′ bosons, the observed 95 % Bayesian credibility level limits range from 9.3 pb to 0.95 pb for masses in the range of m[subscript Z′]=500 GeV to m[subscript Z′]=1300 GeV. The corresponding excluded mass region for a leptophobic topcolour Z′ boson (Kaluza-Klein gluon excitation in the Randall-Sundrum model) is m[subscript Z′]<880 GeV (mgKK<1130 GeV m[subscript gKK]<1130 GeV).
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-012-2083-1
