YSF talk: Search for new physics in top quark production with additional leptons using the framework of effective field theory

This analysis presents a search for new physics impacting associated top quark production within the context of effective field theory (EFT). Making use of 138~fb$^{-1}$ of proton-proton collisions at $\sqrt{s}=13$ TeV collected by the CMS experiment at the CERN LHC during 2016-2018, the analysis selects events with multiple jets, b-tagged jets, and two same-sign leptons or three or more leptons. The data are further binned according to kinematical distributions associated with the transverse momentum of the objects in the event. The effects of 26 dimension-six EFT operators are incorporated into the simulation, allowing for the predicted yields in each observable bin to be parameterized in terms of the strengths of the 26 EFT operators. A simultaneous fit of the 26 EFT parameters to the observed data is performed, and confidence intervals are extracted. The results are consistent with the standard model prediction.