PoS - Proceedings of Science
Volume 340 - The 39th International Conference on High Energy Physics (ICHEP2018) - Parallel: Higgs Physics
Measurements of $t\bar{t}H$ production at CMS
C. Diez Pardos*  on behalf of the CMS Collaboration
Full text: pdf
Published on: August 02, 2019
Recent searches for the production of a Higgs boson (H) in association with a top quark pair (${\rm t\bar{t}H}$) by the CMS Collaboration are presented. They are performed using 36 fb$^{-1}$ of LHC pp collision data at $\sqrt{s}$=13 TeV collected in 2016. The analyses exploit several Higgs boson decay channels, together with different top quark decay modes. The results combined with previous searches yield the first observation of the ${\rm t\bar{t}H}$ production process. An excess of events is observed with a significance of 5.2 standard deviations over the expectation from the background-only hypothesis. The combined best fit signal strength normalized to the standard model prediction is 1.26$^{+0.31}_{-0.26}$.
DOI: https://doi.org/10.22323/1.340.0611
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