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  • Paper1AtlasHiggsObservation

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Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC

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  • ATLAS Collaboration
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<mark>Journal publication date</mark>17/09/2012
<mark>Journal</mark>Physics Letters B
Issue number1
Volume716
Number of pages29
Pages (from-to)1-29
<mark>State</mark>Published
<mark>Original language</mark>English

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(⁎)→4ℓ, H→γγ and H→WW(⁎)→eνμν in the 8 TeV data are combined with previously published results of searches for H→ZZ(⁎), WW(⁎), bbbar and τ+τ− in the 7 TeV data and results from improved analyses of the H→ZZ(⁎)→4ℓ and H→γγ 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 1.7×10−9, is compatible with the production and decay of the Standard Model Higgs boson.

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This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited.