HEPData

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.

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Figure 2 in the paper.

10.17182/hepdata.83809.v1/t1

Best fit value of the ttH signal strength modifier $\mu_{\mathrm{ttH}}$, with its 1 and 2 standard deviation confidence intervals ($\sigma$),...
https://www.hepdata.net/record/data/296886yaml https://www.hepdata.net/record/data/296886/csvcsv
Table 2

Table 1 in the paper.

10.17182/hepdata.83809.v1/t2

Best fit value, with its uncertainty, of the ttH signal strength modifier $\mu_{\mathrm{ttH}}$, for the five individual decay channels considered,...
https://www.hepdata.net/record/data/296887yaml https://www.hepdata.net/record/data/296887/csvcsv
Table 3

Figure 3 in the paper.

10.17182/hepdata.83809.v1/t3

Distribution of events as a function of the decimal logarithm of S/B, where S and B are the expected post-fit...
https://www.hepdata.net/record/data/296888yaml https://www.hepdata.net/record/data/296888/csvcsv
Table 4

Figure 4 in the paper.

10.17182/hepdata.83809.v1/t4

The test statistic q as a function of $\mu_{\mathrm{ttH}}$ for all decay modes at 7+8 TeV and at 13 TeV,...
https://www.hepdata.net/record/data/296889yaml https://www.hepdata.net/record/data/296889/csvcsv

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