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Study of Top-Quark Production and Decays involving a Tau Lepton at CDF and Limits on a Charged-Higgs Boson Contribution

The CDF collaboration
Phys.Rev. D89 (2014) 091101, 2014

Abstract (data abstract)
Fermilab-Tevatron. We present an analysis of top-antitop quark production and decay into a tau lepton, tau neutrino, and bottom quark. We use the full data set of proton-antiproton collisions at 1.96 TeV center-of-mass energy collected by the Collider Detector at the Fermilab Tevatron during Run II (2001-2011) and corresponding to an integrated luminosity of 9 fb^{-1}. Dilepton events where one lepton is an energetic electron or muon and the other a hadronically-decaying tau lepton are used. The branching fraction of top-quark decays into a charged Higgs boson and a bottom quark, which would imply violation of lepton universality, is limited to be less than 5.9% at 95% confidence level.

  • Table 1

    Data from Page 6 of preprint


    The top-antitop quark production cross section measured assuming standard-model top-quark decays, TOP --> W BOTTOM.

  • Table 2

    Data from Page 7 of preprint


    The branching fraction of the top quark into a tau lepton, a tau neutrino and a bottom quark.

  • Table 3

    Data from Page 7 of preprint


    The ratio of leptonic top branching ratios, 2 * BR(TOP --> TAU NUTAU BOTTOM) / ( BR(TOP --> E NUE...

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