Evidence for the Higgs-Boson Yukawa Coupling to Tau Leptons with the ATLAS Detector

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Evidence for the Higgs-Boson Yukawa Coupling to Tau Leptons with the ATLAS Detector

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Title: Evidence for the Higgs-Boson Yukawa Coupling to Tau Leptons with the ATLAS Detector
Author(s):
Aad, G.;
Abbott, B.;
Abdallah, J.;
Abdel Khalek, S.;
Abdinov, O.;
Aben, R.;
Abi, B.;
Izen, Joseph M.;
Leyton, Michael l;
Meirose, Bernhard;
Namasivayam, Harisankar;
Reeves, Kendall;
ATLAS Collaboration
Date Created: 2015-04-21
Format: Text
Item Type: Article
Keywords: Show Keywords
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⁻¹ and 20.3 fb⁻¹ at centre-of-mass energies of √s̅ = 7 TeV and √s̅ = 8 TeV respectively. All combinations of leptonic (τ → ℓνν̅ 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 {-0.37)^(+0.43) is consistent with the predicted Yukawa coupling strength in the Standard Model.
Publisher: Springer
ISSN: 1029-8479
Source: Journal of High Energy Physics
Link to Related Resource: http://dx.doi.org/10.1007/JHEP04(2015)117
Persistent Link: http://hdl.handle.net/10735.1/4635
Bibliographic Citation: Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, et al. 2015. "Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector." Journal of High Energy Physics: doi:10.1007/JHEP04(2015)117.
Terms of Use: CC BY 4.0 (Attribution)
©2014 CERN for the ATLAS Collaboration

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