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

Abstract

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 sqrt(s) = 7 TeV recorded with the ATLAS detector and corresponding to an integrated luminosity of 4.8 fb^-1. The four-lepton 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, 244 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.

11 pages plus author list (26 pages total), 6 figures, 3 tables, corrected author list, matches published version in Physics Letters B

References in corpus (15)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• New parton distributions for collider physics
• Vector boson pair production at the LHC
• -- HATHOR -- HAdronic Top and Heavy quarks crOss section calculatoR
• Electroweak gauge boson production at hadron colliders through O(alpha_s^2)
• The PDF4LHC Working Group Interim Recommendations
• NLO Electroweak Corrections to Higgs Boson Production at Hadron Colliders
• VBFNLO: A parton level Monte Carlo for processes with electroweak bosons
• Electroweak and QCD corrections to Higgs production via vector-boson fusion at the LHC
• Strong and electroweak corrections to the production of Higgs+2jets via weak interactions at the LHC
• Precise predictions for the Higgs-boson decay H -> W W/Z Z -> 4 leptons
• The PDF4LHC Working Group Interim Report
• Higgs Pseudo-Observables, Second Riemann Sheet and All That
• Normalizing Weak Boson Pair Production at the Large Hadron Collider

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• LHC Signatures of Two-Higgs-Doublets with Fourth Family
• Diphotons from Tetraphotons in the Decay of a 125 GeV Higgs at the LHC
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• Constraints on invisible Higgs decay in MSSM in the light of diphoton rates from the LHC
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• Probing the Supersymmetric Inflaton and Dark Matter link via the CMB, LHC and XENON1T experiments
• Implications of QCD radiative corrections on high-pT Higgs searches
• Extending the Matrix Element Method to Next-to-Leading Order
• Higgs Mass and Gravity Waves in Standard Model False Vacuum Inflation
• Fermiophobic Higgs boson and supersymmetry
• Brief history for the search and discovery of the Higgs particle - A personal perspective
• The Hunt for the Rest of the Higgs Bosons
• A Pseudoscalar Resonance That Could Resemble the Higgs
• Characterizing simplified models for heavy Higgs decays to supersymmetric particles
• Issues with vacuum energy as the origin of dark energy
• A Brief History for the Search and Discovery of the Higgs Particle: A Personal Perspective
• The Composite Particles Model (CPM), Vacuum Structure and ~ 125 GeV Higgs Mass