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Title

Search for resonant production of tt pairs in 4.8  fb−1 of integrated luminosity of pp collisions at √s=1.96  TeV

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Lister, Alison / Wu, Xin
Published in Physical Review. D. 2011, vol. 84, no. 07, p. 072004
Abstract We search for resonant production of tt pairs in 4.8  fb−1 integrated luminosity of pp collision data at s√=1.96  TeV in the lepton+jets decay channel, where one top quark decays leptonically and the other hadronically. A matrix-element reconstruction technique is used; for each event a probability density function of the tt candidate invariant mass is sampled. These probability density functions are used to construct a likelihood function, whereby the cross section for resonant tt production is estimated, given a hypothetical resonance mass and width. The data indicate no evidence of resonant production of tt pairs. A benchmark model of leptophobic Z′→tt is excluded with mZ′<900  GeV/c2 at 95% confidence level.
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CDF COLLABORATION. Search for resonant production of tt pairs in 4.8  fb−1 of integrated luminosity of pp collisions at √s=1.96  TeV. In: Physical Review. D, 2011, vol. 84, n° 07, p. 072004. https://archive-ouverte.unige.ch/unige:38701

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Deposited on : 2014-07-15

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