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Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector

2015-04-21Journal article Open access
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dc.contributor.authorATLAS collaboration (2885 authors)
dc.contributor.authorAguilar-Saavedra, Juan Antonio
dc.contributor.authorAmor Dos Santos, Susana Patricia
dc.contributor.authorAnjos, Nuno
dc.contributor.authorAraque, Juan Pedro
dc.contributor.authorCantrill, Robert
dc.contributor.authorCarvalho, João
dc.contributor.authorCastro, Nuno Filipe
dc.contributor.authorConde Muiño, Patricia
dc.contributor.authorDa Cunha Sargedas De Sousa, Mario Jose
dc.contributor.authorFiolhais, Miguel
dc.contributor.authorGalhardo, Bruno
dc.contributor.authorGomes, Agostinho
dc.contributor.authorGonçalo, Ricardo
dc.contributor.authorJorge, Pedro
dc.contributor.authorLopes, Lourenco
dc.contributor.authorMachado Miguens, Joana
dc.contributor.authorMaio, Amélia
dc.contributor.authorManeira, José
dc.contributor.authorOnofre, António
dc.contributor.authorPalma, Alberto
dc.contributor.authorPedro, Rute
dc.contributor.authorPina, João Antonio
dc.contributor.authorPinto, Belmiro
dc.contributor.authorSantos, Helena
dc.contributor.authorSaraiva, João
dc.contributor.authorSilva, José
dc.contributor.authorTavares Delgado, Ademar
dc.contributor.authorVeloso, Filipe
dc.contributor.authorWolters, Helmut
dc.date.accessioned2019-02-04T05:50:10Z
dc.date.available2019-02-04T05:50:10Z
dc.date.issued2015-04-21
dc.date.updated2019-02-04T05:50:10Z
dc.description.abstractResults 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 $ \sqrt{s}=7 $ TeV and $ \sqrt{s}=8 $ TeV respectively. All combinations of leptonic ( $ \tau \to \ell \nu \overline{\nu} $ 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.
dc.description.versionPeer Reviewed
dc.identifierJHEP 1504 (2015) 117; DOI 10.1007/JHEP04(2015)117
dc.identifier.urihttp://dx.doi.org/10.1007/JHEP04(2015)117
dc.identifier.urihttp://hdl.handle.net/10400.26/26759
dc.language.isoeng
dc.titleEvidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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