We present the results of a search for pair production
of a heavy top-like (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 pp collisions at {\surd}s ñ.96 TeV. We perform parallel
searches for t' \to Wb and t' \to 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 \bar{t}
production cross section and exclude a standard model fourth-generation t'
quark decaying to W b (W q) with mass below 358 (340) GeV/c2 at 95% CL.
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Updated: Monday, 2012 January 30 15:30:55 CST automatically from input from "Stephanie A. Schuler"