Higgs Searches in ATLAS

Abstract : This talk covers the results of a search for the Standard Model Higgs boson in proton-proton collisions with the ATLAS detector at the LHC. 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(*)->4l, 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(*), bb and \tau+\tau- in the 7 TeV data and results from improved analyses of the H->ZZ(*)->4l 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 1.7 x 10-9, is compatible with the production and decay of the Standard Model Higgs boson. First measurements of the couplings of this particle are presented and are compatible with a SM Higgs boson hypothesis.
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Conference papers
XXXII Physics in Collision 2012, Sep 2012, Štrbské Pleso, Slovakia


http://hal.in2p3.fr/in2p3-00733818
Contributor : Françoise Marechal <>
Submitted on : Tuesday, January 15, 2013 - 2:00:49 PM
Last modification on : Tuesday, January 15, 2013 - 4:00:58 PM

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  • HAL Id : in2p3-00733818, version 1
  • ARXIV : 1301.2802

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A.C. Schaffer. Higgs Searches in ATLAS. XXXII Physics in Collision 2012, Sep 2012, Štrbské Pleso, Slovakia. <in2p3-00733818>

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