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Search for resonant production of tt̅ decaying to jets in pp̅ collisions at √s=1.96  TeV

AuthorsAaltonen, T.; Álvarez González, B.; Casal, Bruno ; Cuevas, Javier ; Gómez, G. ; Palencia, Enrique ; Rodrigo, Teresa ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; Vizán, J.
Issue DateOct-2011
PublisherAmerican Physical Society
CitationPhysical Review D 84(7): 072003 (2011)
AbstractThis 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.
Description9 páginas, 4 figuras, 2 tablas.-- PACS numbers: 13.85.Rm, 14.65.Ha, 14.70.Hp, 14.70.Pw.-- CDF Collaboration: et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevD.84.072003
Appears in Collections:(IFCA) Artículos
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