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Search for Resonant Top-Antitop Production in the Lepton Plus Jets Decay Mode Using the Full CDF Data Set

Author(s)
Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Paus, Christoph M. E.
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Abstract
This Letter reports a search for a narrow resonant state decaying into two W bosons and two b quarks where one W boson decays leptonically and the other decays into a quark-antiquark pair. The search is particularly sensitive to top-antitop resonant production. We use the full data sample of proton-antiproton collisions at a center-of-mass energy of 1.96 TeV collected by the CDF II detector at the Fermilab Tevatron, corresponding to an integrated luminosity of 9.45  fb[superscript -1]. No evidence for resonant production is found, and upper limits on the production cross section times branching ratio for a narrow resonant state are extracted. Within a specific benchmark model, we exclude a Z′ boson with mass, M[subscript Z′], below 915  GeV/c[superscript 2] decaying into a top-antitop pair at the 95% credibility level assuming a Z′ boson decay width of Γ[subscript Z′]=0.012M[subscript Z′]. This is the most sensitive search for a narrow qq̅ -initiated tt̅ resonance in the mass region below 750  GeV/c[superscript 2].
Date issued
2013-03
URI
http://hdl.handle.net/1721.1/81294
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T., S. Amerio, D. Amidei, et al. 2013 Search for Resonant Top-Antitop Production in the Lepton Plus Jets Decay Mode Using the Full CDF Data Set. Physical Review Letters 110(12). © 2013 American Physical Society.
Version: Final published version
ISSN
0031-9007
1079-7114

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