A search for a heavy Standard Model Higgs boson decaying via H → Z Z → l+l−q¯q, where l = e or μ, is presented. The search uses a data set of pp collisions at √s = 7 TeV, corresponding to an integrated luminosity of 4.7 fb−1 collected in 2011 by the ATLAS detector at the CERN LHC. No significant excess of events above the estimated background is found. Upper limits at 95% confidence level on the production cross section of a Higgs boson with a mass in the range between 200 and 600 GeV are derived. A Standard Model Higgs boson with a mass in the range 300 GeV mH 322 GeV or 353 GeV mH 410 GeV is excluded at 95% CL. The corresponding expected exclusion range is 351 GeVmH 404 GeV at 95% CL.

Search for a Standard Model Higgs boson in the mass range 200-600 GeV in the H to ZZ to llqq decay channel with the ATLAS detector

CONTA, CLAUDIO;FRANCHINO, SILVIA;FRATERNALI, MARCO;LIVAN, MICHELE;NEGRI, ANDREA;REBUZZI, DANIELA MARCELLA;RIMOLDI, ADELE;USLENGHI, MASSIMILIANO;
2012-01-01

Abstract

A search for a heavy Standard Model Higgs boson decaying via H → Z Z → l+l−q¯q, where l = e or μ, is presented. The search uses a data set of pp collisions at √s = 7 TeV, corresponding to an integrated luminosity of 4.7 fb−1 collected in 2011 by the ATLAS detector at the CERN LHC. No significant excess of events above the estimated background is found. Upper limits at 95% confidence level on the production cross section of a Higgs boson with a mass in the range between 200 and 600 GeV are derived. A Standard Model Higgs boson with a mass in the range 300 GeV mH 322 GeV or 353 GeV mH 410 GeV is excluded at 95% CL. The corresponding expected exclusion range is 351 GeVmH 404 GeV at 95% CL.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/541846
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