Observation of t t H Production

(CMS Collaboration)

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

The 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.

Original languageEnglish
Article number231801
JournalPhysical Review Letters
Volume120
Issue number23
DOIs
Publication statusPublished - 4 Jun 2018

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Higgs bosons
quarks
standard deviation
bosons
protons
center of mass
leptons
luminosity
collisions
sensitivity
detectors
photons
predictions
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Observation of t t H Production. / (CMS Collaboration).

In: Physical Review Letters, Vol. 120, No. 23, 231801, 04.06.2018.

Research output: Contribution to journalArticle

(CMS Collaboration). / Observation of t t H Production. In: Physical Review Letters. 2018 ; Vol. 120, No. 23.
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N2 - The 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.

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