Sirunyan, A.M.Tumasyan, A.Adam, W.Ambrogi, F.Asilar, E.Bergauer, T.Josa, M.I.2020-07-182020-07-1820191434-6044https://doi.org/10.1140/epjc/s10052-019-7387-yhttps://hdl.handle.net/11147/8495A search for new physics in top quark production is performed in proton-proton collisions at 13TeV. The data set corresponds to an integrated luminosity of 35.9fb-1 collected in 2016 with the CMS detector. Events with two opposite-sign isolated leptons (electrons or muons), and b quark jets in the final state are selected. The search is sensitive to new physics in top quark pair production and in single top quark production in association with a W boson. No significant deviation from the standard model expectation is observed. Results are interpreted in the framework of effective field theory and constraints on the relevant effective couplings are set, one at a time, using a dedicated multivariate analysis. This analysis differs from previous searches for new physics in the top quark sector by explicitly separating t W from t t ¯ events and exploiting the specific sensitivity of the t W process to new physics. © 2019, CERN for the benefit of the CMS collaboration.eninfo:eu-repo/semantics/openAccessArticle2-s2.0-8507427745510.1140/epjc/s10052-019-7387-y