Abstract
This Letter reports a search for a narrow resonant state decaying into two bosons and two quarks where one 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 . 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 boson with mass, , below decaying into a top-antitop pair at the 95% credibility level assuming a boson decay width of . This is the most sensitive search for a narrow -initiated resonance in the mass region below .
- Received 25 November 2012
DOI:https://doi.org/10.1103/PhysRevLett.110.121802
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