No abstract

Abstract. Tevatron diboson measurements are reviewed, and new or recent results reported for Wγ, Zγ and ZZ production in the leptonic decay modes, and for WW/WZ production in the lepton plus jets decay mode. The most stringent limits on anomalous triple gauge couplings are reported for each final state.

No abstract

This dissertation describes a search for the Standard Model Higgs boson produced in association with the Z boson via Higgs-strahlung at the CDF II detector at the Tevatron. At a Higgs boson mass between 100 GeV /c 2 and 135 GeV /c 2 , the primary Higgs decay mode is to a pair of b quarks. The associated Z boson can decay to a pair of electrons or muons, allowing detection of a final event signature of two visible leptons and two b quarks. This final state allows reduction of large QCD backgrounds compared to a hadronic Z boson decay, leading to a more sensitive search. To increase sensitivity, standard model matrix element probabilities for Z H signal and the dominant backgrounds are used as components to a likelihood fit in signal fraction.In 2.7 fb −1 of CDF II data, we see no evidence of production of a Higgs boson with a mass between 100 GeV c 2 and 150 GeV /c 2 . Using the Feldman-Cousins technique to set a limit, at 95% coverage and a Higgs boson mass of 115 GeV /c 2 , the median expected limit was 12.1 × σ S M and a limit of 8.2 × σ S M was observed, where σ S M is the NNLO theoretical cross section of p p → Z H → l + l − b b at s=1.96 T eV . Cross section limits are computed at a range of Higgs boson mass values between 100 GeV /c 2 and 150 GeV /c 2 .