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Signs of new physics are probed in the context of an Effective Field Theoryusing events containing one or more top quarks in association with additionalleptons. Data consisting of proton-proton collisions at a center-of-mass energyof $\sqrt{s}=$13 TeV was collected at the LHC by the CMS experiment in 2017. Weapply a novel technique to parameterize 16 dimension-six EFT operators in termsof the respective Wilson coefficients (WCs). A simultaneous fit is performed tothe data in order to extract the two standard deviation confidence intervals(CIs) of the 16 WCs. The Standard Model value of zero is completely containedin most CIs, and is not excluded by a statistically significant amount in anyinterval.

Using associated top quark production to probe for new physics within the framework of effective field theory