Journal
PHYSICAL REVIEW LETTERS
Volume 120, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.231801
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- Division Of Physics [1508869, 1607126] Funding Source: National Science Foundation
- Science and Technology Facilities Council [ST/J004871/1, ST/K003542/1 GRID PP, ST/L005603/1, ST/K003542/1, ST/J005479/1, ST/I003622/1, ST/M004775/1, ST/N001273/1, ST/F007434/1, ST/I505580/1] Funding Source: researchfish
- STFC [ST/J005479/1, ST/F007434/1, 1708172, ST/N001273/1, ST/L005603/1, ST/I505580/1, ST/J004871/1, ST/M004775/1, ST/K003542/1, ST/N003985/1, ST/I003622/1, ST/N000242/1] Funding Source: UKRI
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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 root 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, tau 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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