Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector
Name
Aad-2015-Evidence for the Hig.pdf
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1.38 MB
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0a52312ba214a0be5c1195671f009a16
Author(s)
Taylor, Frank E.
Date Issued
April 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. “Evidence for the Higgs-Boson Yukawa Coupling to Tau Leptons with the ATLAS Detector.” J. High Energ. Phys. 2015, no. 4 (April 2015). © 2015 CERN, for the benefit of the ATLAS Collaboration
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Final published version
Abstract
Results of a search for H → ττ decays are presented, based on the full set of proton-proton collision data recorded by the ATLAS experiment at the LHC during 2011 and 2012. The data correspond to integrated luminosities of 4.5 fb[superscript −1] and 20.3 fb[superscript −1] at centre-of-mass energies of √s = 7 TeV and √s = 8 TeV respectively. All combinations of leptonic (τ→ℓν[bar over ν] with ℓ = e, μ) and hadronic (τ → hadrons ν) tau decays are considered. An excess of events over the expected background from other Standard Model processes is found with an observed (expected) significance of 4.5 (3.4) standard deviations. This excess provides evidence for the direct coupling of the recently discovered Higgs boson to fermions. The measured signal strength, normalised to the Standard Model expectation, of μ = 1. 43 {+ 0.43 over − 0.37] is consistent with the predicted Yukawa coupling strength in the Standard Model.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/jhep04(2015)117
