Search for Resonant Top-antitop Production in the Semi-leptonic Decay Mode Using the Full CDF Data Set

• Published in: arXiv.org
• Main Author: Collaboration, CDF
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 22.11.2012
• Subjects: Antiparticles; Antiprotons; Bosons; Decay; Luminosity; Physics - High Energy Physics - Experiment; Quarks; Searching
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1211.5363

This Letter reports a search for a narrow resonant state decaying into two \(W\) bosons and a bottom-antibottom quark pair 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 below 915 GeV/\(c^2\) decaying into a top-antitop pair at the 95% credibility level assuming a \(Z'\) boson decay width of \(\Gamma_{Z'} = 0.012 M_{Z'}\). This is the most sensitive search for a narrow \(\ensuremath{q\bar{q}}\)-initiated \(\ensuremath{t\bar{t}}\) resonance in the mass region below 750 GeV/\(c^2\).