Abstract
A search for new physics in top quark production is performed in proton-proton collisions at 13,text {TeV} . The data set corresponds to an integrated luminosity of 35.9{,text {fb}^{-1}} collected in 2016 with the CMS detector. Events with two opposite-sign isolated leptons (electrons or muons), and mathrm{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 mathrm{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 mathrm{t}mathrm{W} from mathrm{t}{bar{mathrm{t}}} events and exploiting the specific sensitivity of the mathrm{t}mathrm{W} process to new physics.
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More From: The European physical journal. C, Particles and fields
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