ATLAS Higgs Searches

A search for the Standard Model Higgs boson at the Large Hadron Collider (LHC) running at a centre-of-mass energy of 7 TeV is reported, based on a total integrated luminosity of 1.0 to 2.3 fb−1 collected by the ATLAS detector in 2011. Several Higgs boson decay channels are combined in a mass range from 110 GeV to 600 GeV. No significant evidence for a signal is observed. The Standard Model Higgs boson mass ranges from 146 GeV to 232 GeV, 256 GeV to 282 GeV and 296 GeV to 466 GeV are excluded at the 95% CL, while the expected Standard Model Higgs boson exclusion in the absence of signal ranges to 131 GeV to 447 GeV. In addition, the search for the neutral Higgs bosons in the Minimal Supersymmetric extension to the Standard Model (MSSM) is presented, where exclusion limits at the 95% CL are derived for the production cross section of a generic Higgs boson phi as a function of the Higgs boson mass and for A/H/h-> tau tau in the MSSM as a function of the parameters mA and tanB in the m^max_h scenario.