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 Γ Z′ =0.012M Z′ . This is the most sensitive search for a narrow qq̄-initiated tt̄ resonance in the mass region below 750 GeV/c2.

Search for resonant top-antitop production in the lepton plus jets decay mode using the full CDF data set

Manca, G.;
2013-01-01

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 Γ Z′ =0.012M Z′ . This is the most sensitive search for a narrow qq̄-initiated tt̄ resonance in the mass region below 750 GeV/c2.
2013
Physics and astronomy (all)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/231341
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