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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

Barton, Adam and Borissov, Guennadi and Bouhova-Thacker, Evelina and Chilingarov, Alexandre and Davidson, Ruth and de Mora, Lee and Dearnaley, William and Fox, Harald and Henderson, Robert and Hughes, Gareth and Jones, Roger and Kartvelishvili, Vakhtang and Long, Robin and Love, Peter and Maddocks, Harvey and Smizanska, Maria and Walder, James (2012) Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC. Physics Letters B, 716 (1). pp. 1-29. ISSN 0370-2693

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    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.

    Item Type: Article
    Journal or Publication Title: Physics Letters B
    Additional Information: 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.
    Uncontrolled Keywords: Higgs boson ; LHC
    Subjects:
    Departments: Faculty of Science and Technology > Physics
    ID Code: 61078
    Deposited By: ep_importer_pure
    Deposited On: 19 Dec 2012 10:26
    Refereed?: Yes
    Published?: Published
    Last Modified: 18 Nov 2017 12:10
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/61078

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