10-1007-JHEP04(2015)117.pdf (1.38 MB)
Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector
journal contribution
posted on 2023-06-08, 22:32 authored by Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, Alessandro CerriAlessandro Cerri, Iacopo Vivarelli, Lily AsquithLily Asquith, Benedict AllbrookeBenedict Allbrooke, Carlos Chavez Barajas, Itzebelt Santoyo Castillo, Tina Potter, Kerim Suruliz, Mark SuttonMark Sutton, and others (ATLAS collaboration)Results of a search for H ? t t 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 vs = 7 TeV and vs = 8 TeV respectively. All combinations of leptonic (t ? `??¯ with ` = e, µ) and hadronic (t ? hadrons ?) 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 -0.37 is consistent with the predicted Yukawa coupling strength in the Standard Model.
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- Published
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- Published version
Journal
Journal of High Energy PhysicsISSN
1029-8479Publisher
Springer VerlagExternal DOI
Issue
117Volume
2015Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2015-09-16First Open Access (FOA) Date
2015-09-16First Compliant Deposit (FCD) Date
2015-09-16Usage metrics
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