Abstract
A search for the Standard Model Higgs boson in proton-proton collisions with
the ATLAS detector at the LHC is presented. The datasets used correspond to
integrated luminosities of approximately 4.8 fb^-1 collected at sqrt(s) = 7 TeV
in 2011 and 5.8 fb^-1 at sqrt(s) = 8 TeV in 2012. Individual searches in the
channels H->ZZ^(*)->llll, H->gamma gamma and H->WW->e nu mu nu in the 8 TeV
data are combined with previously published results of searches for H->ZZ^(*),
WW^(*), bbbar and tau^+tau^- in the 7 TeV data and results from improved
analyses of the H->ZZ^(*)->llll and H->gamma gamma channels in the 7 TeV data.
Clear evidence for the production of a neutral boson with a measured mass of
126.0 +/- 0.4(stat) +/- 0.4(sys) GeV is presented. This observation, which has
a significance of 5.9 standard deviations, corresponding to a background
fluctuation probability of 1.7x10^-9, is compatible with the production and
decay of the Standard Model Higgs boson.
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