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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
