Search for the Standard Model Higgs boson in the decay channel H?ZZ (*) ?4? with 4.8 fb -1 of pp collision data at ?s=7 TeV with ATLAS

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Erscheinungsjahr:
2012
Medientyp:
Text
Schlagworte:
  • 3106
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  • 3106
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Beschreibung:
  • This Letter presents a search for the Standard Model Higgs boson in the decay channel H -> ZZ(({*})) -> l(+)l(-)l(-)+l(')-, where l,l' = e or mu, using proton-proton collisions at root s = 7 TeV recorded with the ATLAS detector and corresponding to an integrated luminosity of 4.8 fb(-1). The four-lepton invariant mass distribution is compared with Standard Model background expectations to derive upper limits on the cross section of a Standard Model Higgs boson with a mass between 110 GeV and 600 GeV. The mass ranges 134-156 GeV, 182-233 GeV, 256-265 GeV and 268-415 GeV are excluded at the 95\% confidence level. The largest upward deviations from the background-only hypothesis are observed for Higgs boson masses of 125 GeV, 244 GeV and 500 GeV with local significances of 2.1, 2.2 and 2.1 standard deviations, respectively. Once the look-elsewhere effect is considered, none of these excesses are significant. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.
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  • info:eu-repo/semantics/restrictedAccess
Quellsystem:
Forschungsinformationssystem der UHH

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oai:www.edit.fis.uni-hamburg.de:publications/59ef8f37-7d5b-4c76-bae3-787d629d8329