Search for resonant production of tt̅ decaying to jets in pp̅ collisions at √s=1.96 TeV
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Aaltonen-2011-Search for resonant.pdf
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Author(s)
Goncharov, Maxim
Makhoul, Khaldoun
Paus, Christoph M. E.
Gomez-Ceballos, Guillelmo
Bauer, Gerry P
Date Issued
October 2011
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Search for Resonant Production of Tt[over ¯] Decaying to Jets in Pp[over ¯] Collisions at Sqrt[s]=1.96 TeV.” Physical Review D 84.7 (2011). © 2011 American Physical Society
Version
Final published version
Abstract
This paper reports a search for nonstandard model topquark resonances, Z′, decaying to tt̅ →W[superscript +]bW-b̅ , where both W decay to quarks. We examine the top-antitop quark invariant mass spectrum for the presence of narrow resonant states. The search uses a data sample of pp̅ collisions at a center of mass energy of 1.96 TeV collected by the CDF II detector at the Fermilab Tevatron, with an integrated luminosity of 2.8 fb-[superscript 1]. No evidence for top-antitop quark resonant production is found. We place upper limits on the production cross section times branching ratio for a specific topcolor assisted technicolor model in which the Z′ has a width of Γ[subscript Z]′=0.012M[subscriptZ]′. Within this model, we exclude a Z′ boson with masses below 805 GeV/c[superscript 2] at the 95% confidence level.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.84.072003
