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

• Main Authors: Gomez-Ceballos, Guillelmo (Contributor), Goncharov, Maxim (Contributor), Paus, Christoph M. E. (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor), Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2013-10-03T19:58:45Z.
• Subjects: Article
• Online Access: Get fulltext

 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].