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Observation of $\mathrm{t\overline{t}}$H production

2018-06-05Journal article Open access
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dc.contributor.authorCMS collaboration (2301 authors)
dc.contributor.authorNayak, Aruna
dc.contributor.authorAraujo, Mariana
dc.contributor.authorBargassa, Pedrame
dc.contributor.authorBeirão Da Cruz E Silva, Cristóvão
dc.contributor.authorDi Francesco, Agostino
dc.contributor.authorFaccioli, Pietro
dc.contributor.authorGalinhas, Bruno
dc.contributor.authorGallinaro, Michele
dc.contributor.authorHollar, Jonathan
dc.contributor.authorLeonardo, Nuno
dc.contributor.authorSeixas, Joao
dc.contributor.authorStrong, Giles
dc.contributor.authorToldaiev, Oleksii
dc.contributor.authorVadruccio, Daniele
dc.contributor.authorVarela, Joao
dc.contributor.authorVischia, Pietro
dc.contributor.authorDavid Tinoco Mendes, Andre
dc.contributor.authorSilva, Pedro
dc.contributor.authorMusella, Pasquale
dc.date.accessioned2019-02-05T16:11:14Z
dc.date.available2019-02-05T16:11:14Z
dc.date.issued2018-06-05
dc.date.updated2019-02-05T16:11:14Z
dc.description.abstractThe observation of Higgs boson production in association with a top quark-antiquark pair is reported, based on a combined analysis of proton-proton collision data at center-of-mass energies of s=7, 8, and 13 TeV, corresponding to integrated luminosities of up to 5.1, 19.7, and 35.9  fb-1, respectively. The data were collected with the CMS detector at the CERN LHC. The results of statistically independent searches for Higgs bosons produced in conjunction with a top quark-antiquark pair and decaying to pairs of W bosons, Z bosons, photons, τ leptons, or bottom quark jets are combined to maximize sensitivity. An excess of events is observed, with a significance of 5.2 standard deviations, over the expectation from the background-only hypothesis. The corresponding expected significance from the standard model for a Higgs boson mass of 125.09 GeV is 4.2 standard deviations. The combined best fit signal strength normalized to the standard model prediction is 1.26-0.26+0.31.
dc.description.versionPeer Reviewed
dc.identifierPhys.Rev.Lett. 120 (2018) 231801; DOI 10.1103/PhysRevLett.120.231801
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevLett.120.231801
dc.identifier.urihttp://hdl.handle.net/10400.26/27613
dc.language.isoeng
dc.titleObservation of $\mathrm{t\overline{t}}$H production
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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