Search for a Heavy Top-Like Quark in p\bar{p} Collisions at {\surd}s = 1.96 TeV

Details Search for a Heavy Top-Like Quark in p\bar{p} Collisions at {\surd}s = 1.96 TeV Search for a Heavy Top-Like Quark in p\bar{p} Collisions at {\surd}s = 1.96 TeV

2011-07-20

arxiv.org/abs/1107.3875v2

Phys. Rev. Lett. 107, 261801 (2011)

Physics

High Energy Physics

High Energy Physics - Experiment

submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.107.261801

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 = 1.96 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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