Search for associated production of Higgs bosons and top quarks in multilepton final states at $\sqrt{s}=13$ TeV at CMS

Searches for the production of a standard model (SM) Higgs boson in association with a top quark pair ($t\bar{t}H$) is presented, in the multilepton ($e$, $\mu$, $\tau$) final states. The dataset analyzed corresponds to an integrated luminosity of 35.9 fb$^{-1}$ of proton--proton collisions at $\sqrt{s}=13$ TeV by the CMS experiment in 2016. A best fit $t\bar{t}H$ yield of 1.5$^{+0.5}_{-0.5}$ times the SM prediction is measured in $e$, $\mu$ final states, and 0.7$^{+0.6}_{-0.5}$ times the SM prediction in final states with at least one hadronic $\tau$, with an observed (expected) significance of respectively 3.3$\sigma$ (2.5$\sigma$) and 1.4$\sigma$ (1.8$\sigma$).