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′=0.012M Z′. This is the most sensitive search for a narrow qq̄-initiated tt̄ resonance in the mass region below 750 GeV/c2. © 2013 American Physical Society.
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevLett.110.121802 | |
Codice identificativo ISI: | WOS:000316411100004 | |
Codice identificativo Scopus: | 2-s2.0-84875339836 | |
Handle: | http://hdl.handle.net/11695/64537 | |
URL: | http://oai.aps.org/filefetch?identifier=10.1103/PhysRevLett.110.121802&component=fulltext&description=markup&format=xml | |
Titolo: | Search for resonant top-antitop production in the lepton plus jets decay mode using the full CDF data set | |
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Appare nelle tipologie: | 1.1 Articolo in rivista |