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Search for resonant production of tt[over ¯] decaying to jets in pp[over ¯] collisions at sqrt[s]=1.96 TeV

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Aaltonen, T., Álvarez González, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Appel, J., Apresyan, A. et al.
(2011) Search for resonant production of tt[over ¯] decaying to jets in pp[over ¯] collisions at sqrt[s]=1.96 TeV. Physical Review D, Vol.84 (No. 7). doi:10.1103/PhysRevD.84.072003

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Official URL: http://dx.doi.org/10.1103/PhysRevD.84.072003

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Abstract

This paper reports a search for nonstandard model topquark resonances, Z′, decaying to tt̅ →W+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-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 ΓZ′=0.012MZ′. Within this model, we exclude a Z′ boson with masses below 805  GeV/c2 at the 95% confidence level.

Item Type: Journal Article
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review D
Publisher: American Physical Society
ISSN: 1550-7998
Official Date: 2011
Dates:
DateEvent
2011Published
Volume: Vol.84
Number: No. 7
DOI: 10.1103/PhysRevD.84.072003
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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