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Measurements of the Higgs boson production and decay rates and coupling strengths using pp collision data at s√=7s=7 and 8 TeV in the ATLAS experiment

, ATLAS Collaboration and Barton, Adam Edward and Beattie, Michael and Borissov, Guennadi and Bouhova-Thacker, Evelina Vassileva and Dearnaley, William and Fox, Harald and Grimm, Kathryn Ann Tschann and Henderson, Robert Charles William and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin Eamonn and Love, Peter Allan and Maddocks, Harvey and Skinner, Malcolm and Smizanska, Maria and Walder, James William (2016) Measurements of the Higgs boson production and decay rates and coupling strengths using pp collision data at s√=7s=7 and 8 TeV in the ATLAS experiment. European Physical Journal C: Particles and Fields, 76 (1). ISSN 1434-6044

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    Abstract

    Combined analyses of the Higgs boson production and decay rates as well as its coupling strengths to vector bosons and fermions are presented. The combinations include the results of the analyses of the H→γγ,ZZ∗,WW∗,Zγ,bb¯,ττH→γγ,ZZ∗,WW∗,Zγ,bb¯,ττ and μμμμ decay modes, and the constraints on the associated production with a pair of top quarks and on the off-shell coupling strengths of the Higgs boson. The results are based on the LHC proton-proton collision datasets, with integrated luminosities of up to 4.7 fb−1fb−1 at s√=7s=7 TeV and 20.3 fb−1fb−1 at s√=8s=8 TeV, recorded by the ATLAS detector in 2011 and 2012. Combining all production modes and decay channels, the measured signal yield, normalised to the Standard Model expectation, is 1.18+0.15−0.141.18−0.14+0.15 . The observed Higgs boson production and decay rates are interpreted in a leading-order coupling framework, exploring a wide range of benchmark coupling models both with and without assumptions on the Higgs boson width and on the Standard Model particle content in loop processes. The data are found to be compatible with the Standard Model expectations for a Higgs boson at a mass of 125.36 GeV for all models considered.

    Item Type: Article
    Journal or Publication Title: European Physical Journal C: Particles and Fields
    Additional Information: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3.
    Subjects:
    Departments: Faculty of Science and Technology > Physics
    ID Code: 78867
    Deposited By: ep_importer_pure
    Deposited On: 31 Mar 2016 12:30
    Refereed?: Yes
    Published?: Published
    Last Modified: 21 Nov 2017 19:24
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/78867

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