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# Extraction of Top Backgrounds in the Higgs Boson Search with the $H\rightarrow WW^{\star}\rightarrow\ell\ell+\met$ Decay with a Full-Jet Veto at the LHC

01/2011;
Source: arXiv

ABSTRACT The search for a Standard Model Higgs boson with the $H\rightarrow WW^{\star}\rightarrow\ell\ell+\met$ decay and the application of a full-jet
veto yields a strong sensitivity in the mass range $130<m_H<200\,\gev$. One of
the residual backgrounds is related to processes involving top quarks. A method
for the extraction of top backgrounds is evaluated at the parton and hadronic
levels based on the data-driven extraction of the jet veto survival
probability. The uncertainty of the proposed method is about 15%.

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##### Article: Search for the Standard Model Higgs boson in the H -> WW(*) -> l nu l nu decay mode with 4.7 /fb of ATLAS data at sqrt(s) = 7 TeV
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ABSTRACT: A search for the Standard Model Higgs boson in the H -> WW(*) -> l nu l nu (l = e, mu) decay mode is presented. The search is performed using proton-proton collision data corresponding to an integrated luminosity of 4.7 /fb at a centre-of-mass energy of 7 TeV collected during 2011 with the ATLAS detector at the Large Hadron Collider. No significant excess of events over the expected background is observed. An upper bound is placed on the Higgs boson production cross section as a function of its mass. A Standard Model Higgs boson with mass in the range between 133 GeV and 261 GeV is excluded at 95% confidence level, while the expected exclusion range is from 127 GeV to 233 GeV.