CMS Collaboration2015-04-202015-04-202014CMS Collaboration. "Search for the associated production of the Higgs boson with a top-quark pair." <i>Journal of High Energy Physics,</i> 2014, (2014) Springer: 87. http://dx.doi.org/10.1007/JHEP09(2014)087.https://hdl.handle.net/1911/79607A search for the standard model Higgs boson produced in association with a top-quark pair (ttH) is presented, using data samples corresponding to integrated luminosities of up to 5.1 fb−1 and 19.7 fb−1 collected in pp collisions at center-of-mass energies of 7 TeV and 8 TeV respectively. The search is based on the following signatures of the Higgs boson decay: H → hadrons, H → photons, and H → leptons. The results are characterized by an observed ttH signal strength relative to the standard model cross section, μ=σ/σ SM,under the assumption that the Higgs boson decays as expected in the standard model. The best fit value is μ = 2.8 ± 1.0 for a Higgs boson mass of 125.6 GeV.engJHEP is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0Journal articleHadron-Hadron ScatteringHiggs physicsTop physicshttp://dx.doi.org/10.1007/JHEP09(2014)087