Search for four-top-quark production with four-lepton final states in CMS

The search for four-top-quark production with four leptons as a final product at $\sqrt{s} = 13 \mbox{ TeV}$ is presented in this report. In this analysis, Monte-Carlo generated datasets, both with four-top-quark production process and background processes, are used to train two machine learning systems with boosted decision tree and neural networks. By utilising discriminators from these two machine learning techniques, we have determined limits of four-top-quark production cross section in $\mbox{35.9 fb}^{-1}$ of CMS data recorded in 2016, approaching the sensitivity of cross section limits reported in previous analyses by the CMS experiment.