ATLAS Higgs Searches

Abstract

On behalf of the ATLAS Collaboration.International audienceA combined search for the Standard Model Higgs boson with the ATLAS experiment at LHC using datasets corresponding to integrated luminosities from 1.0 to 2.3 fb−1 of pp collisions at √s = 7 TeV is presented. The Higgs boson mass ranges 146 - 230 GeV, 256 - 282 GeV and 296 - 459 GeV are excluded at 95% Confidence Level, while the range 131 - 450 GeV is expected to be excluded in the absence of a signal. Searches in several decay channels are discussed: H → γ γ , H → b ¯ b, H → τ + τ −, H → ZZ ( ∗) → l + l −l ′ +l ′ −, → WW ( ∗) → l ν l ν , H → WW → l ν qq, H → ZZ → l l ν ν , H → ZZ → l l qq. No significant excess was observed in any of these channels for the entire mass range from 110 to 600 GeV. In addition, a search for neutral Higgs bosons in the Minimal Supersymmetric extension to the Standard Model (MSSM) is presented