Search for a Standard Model Higgs boson in the mass range 200-600 GeV in the H -> ZZ -> l(+)l(-)q(q)over-bar decay channel with the ATLAS detector
2012
Abstract
A search for a heavy Standard Model Higgs boson decaying via H -> ZZ -> l(+)l(-)q (q) over bar, where l = e or mu, is presented. The search uses a data set of pp collisions at root 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 {= m(H) 322 {= GeV or 353 GeV {= m(H) {= 410 GeV is excluded at 95% CL The corresponding expected exclusion range is 351 GeV {= m(H) {= 404 GeV at 95% CL.