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

CollaborationWith : Clark, Allan Geoffrey / Wu, Xin
Published in Physical Review Letters. 2013, vol. 110, no. 12, p. 121802
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−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, MZ′, below 915  GeV/c2 decaying into a top-antitop pair at the 95% credibility level assuming a Z′ boson decay width of ΓZ′=0.012MZ′. This is the most sensitive search for a narrow qq-initiated tt resonance in the mass region below 750  GeV/c2.
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CDF COLLABORATION. Search for Resonant Top-Antitop Production in the Lepton Plus Jets Decay Mode Using the Full CDF Data Set. In: Physical Review Letters, 2013, vol. 110, n° 12, p. 121802. https://archive-ouverte.unige.ch/unige:38840

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Deposited on : 2014-07-22

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