Observation of tt‾ H production
Observation of tt‾ H production
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+0.31−0.26.
1-17
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
8 June 2018
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
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+0.31−0.26.
Text
PhysRevLett.120.231801
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e-pub ahead of print date: 4 June 2018
Published date: 8 June 2018
Identifiers
Local EPrints ID: 424667
URI: http://eprints.soton.ac.uk/id/eprint/424667
ISSN: 1079-7114
PURE UUID: f0064443-1614-4e84-bf3c-8a486caa1b20
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Date deposited: 05 Oct 2018 11:40
Last modified: 16 Mar 2024 03:55
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Author:
A.M. Sirunyan
Corporate Author: The CMS Collaboration
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