Search for new physics in top quark production in dilepton final states in proton-proton collisions at sqrt(s) = 13 TeV

A search for new physics in top quark produc-tion is performed in proton-proton collisions at 13 TeV. Thedata set corresponds to an integrated luminosity of 35.9fb−1collected in 2016 with the CMS detector. Events with twoopposite-sign isolated leptons (electrons or muons), and bquark jets in the final state are selected. The search is sen-sitive to new physics in top quark pair production and insingle top quark production in association with a W boson.No significant deviation from the standard model expecta-tion is observed. Results are interpreted in the framework ofeffective field theory and constraints on the relevant effectivecouplings are set, one at a time, using a dedicated multivari-ate analysis. This analysis differs from previous searches fornew physics in the top quark sector by explicitly separatingtW from t ̄t events and exploiting the specific sensitivity ofthe tW process to new physics.