Search for the b b ¯ decay of the Standard Model Higgs boson in associated ([W over Z])H production with the ATLAS detector
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The-2015-Search for the (Form.pdf
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Author(s)
Taylor, Frank E.
Date Issued
January 2015
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, et al. “Search for the b b ¯ Decay of the Standard Model Higgs Boson in Associated ([W over Z])H Production with the ATLAS Detector.” J. High Energ. Phys. 2015, no. 1 (January 2015).
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Final published version
Abstract
A search for the bb¯ decay of the Standard Model Higgs boson is performed with the ATLAS experiment using the full dataset recorded at the LHC in Run 1. The integrated luminosities used are 4.7 and 20.3 fb[superscript −1] from pp collisions at √s = 7 TeV and 8 TeV, respectively. The processes considered are associated (W/Z)H production, where W → [eν over μν], Z → [ee over μμ] and Z → νν. The observed (expected) deviation from the background-only hypothesis corresponds to a significance of 1.4 (2.6) standard deviations and the ratio of the measured signal yield to the Standard Model expectation is found to be μ = 0.52 ± 0.32 (stat.) ± 0.24 (syst.) for a Higgs boson mass of 125.36 GeV. The analysis procedure is validated by a measurement of the yield of ([W over Z])Z production with Z→bb¯ in the same final states as for the Higgs boson search, from which the ratio of the observed signal yield to the Standard Model expectation is found to be 0.74 ± 0.09 (stat.) ± 0.14 (syst.).
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP01(2015)069
