Observation of t ¯ t H production
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Type :
Article
Publication Status :
Published
Access :
openAccess
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 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).
Source :
Physical Review Letters
Date :
2018-06-04
Volume :
120
Issue :
23
Publisher :
American Physical Society
URI
http://hdl.handle.net/10679/6232https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.120.231801
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