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Search for the Standard Model Higgs boson in the 6 E T plus jets sample

We search for the Higgs boson produced in association with a Z or W boson. We consider a scenario where Z → νν, or W → lν and the lepton escapes detection; the Higgs boson decays into a bb pair. This analysis uses 5.7 fb−1 of CDF data. It implements a NN to remove the huge backgrounds. We check the goodness of our background modeling by comparing data against backgrounds in many control regions, and find good agreement. An additional NN is used to discriminate the Higgs signal from the remaining background. Observing no significant excess in the data we place 95% confidence level upper limits on the Higgs boson production cross section. For a mass of 115 GeV/c the expected (observed) limit is 4 −1.2 (2.3) times the standard model prediction. This result is one of the most sensitive at the Tevatron.