This dissertation describes a search for the standard model Higgs boson (H) produced in association with a Z boson at the DØ experiment. This analysis is based on an integrated luminosity of L = 370 pb-1 of data. The pp¯ → ZH → µ+µ - + bb¯ channel is studied where the Z boson decays to µ+µ- and the H decays to bb¯. In order to boost the signal rate we first introduce the optimized di-muon isolation probability for separating the Z + 2j signal from the multi-jet background, then use the optimized b-jet identifier to enhance the double b-tag signal significance. The upper limits on the σ( pp¯ → ZH) × Br(H → bb¯) for Higgs masses between 105 GeV and 145 GeV are set at 95% C.L.
|School:||State University of New York at Stony Brook|
|School Location:||United States -- New York|
|Source:||DAI-B 69/10, Dissertation Abstracts International|
|Keywords:||B-tagging, D0, Higgs boson, Muons, Standard Model, Tevatron|
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