Publicação: Search for a Fourth Generation t ' Quark in p(p)over-bar Collisions at root s=1.96 TeV
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2011-08-16
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Amer Physical Soc
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We present a search for pair production of a fourth generation t' quark and its antiparticle, followed by their decays to a W boson and a jet, based on an integrated luminosity of 5: 3 fb(-1) of proton-antiproton collisions at root s = 1.96 TeV collected by the D0 Collaboration at the Fermilab Tevatron Collider. We set upper limits on the t'(t) over bar' production cross section that exclude at the 95% C. L. a t' quark that decays exclusively to W + jet with a mass below 285 GeV. We observe a small excess in the mu + jets channel which reduces the mass range excluded compared to the expected limit of 320 GeV in the absence of a signal.
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Physical Review Letters. College Pk: Amer Physical Soc, v. 107, n. 8, p. 7, 2011.
