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Title: Search for a Heavy Toplike Quark in pp̅ Collisions at √s=1.96  TeV
Authors: Aaltonen, T., Álvarez González, B., Casal, Bruno, Cuevas, Javier, Gómez, G., Rodrigo, Teresa, Ruiz Jimeno, Alberto, Scodellaro, Luca, Vila, Iván, Vila, Iván, Cabrera, Susana, Cuenca Almenar, Cristóbal
Issue Date: Dec-2011
Publisher: American Physical Society
Abstract: We present the results of a search for pair production of a heavy toplike (t′) quark decaying to Wq final states using data corresponding to an integrated luminosity of 5.6  fb-1 collected by the CDF II detector in pp̅ collisions at √s=1.96  TeV. We perform parallel searches for t′→Wb and t′→Wq (where q is a generic down-type quark) in events containing a lepton and four or more jets. By performing a fit to the two-dimensional distribution of total transverse energy versus reconstructed t′ quark mass, we set upper limits on the t′t̅ ′ production cross section and exclude a standard model fourth-generation t′ quark decaying to Wb (Wq) with mass below 358 (340)  GeV/c2 at 95% C.L.
Description: 8 páginas, 3 figuras, 3 tablas.-- CDF Collaboration: et al.
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ISSN: 0031-9007
???metadata.dc.identifier.doi???: 10.1103/PhysRevLett.107.261801
Citation: Physical Review Letters 107(26): 261801 (2011)
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