Publication Date:
2019-11-01
Description:
A search for new physics in top quark production is performed in proton-proton collisions at $$13,ext {TeV} $$13TeV. The data set corresponds to an integrated luminosity of $$35.9{,ext {fb}^{-1}} $$35.9fb-1 collected in 2016 with the CMS detector. Events with two opposite-sign isolated leptons (electrons or muons), and $$mathrm{b}$$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 $$mathrm{W}$$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 $$mathrm{t}mathrm{W}$$tW from $$mathrm{t}{ ar{mathrm{t}}}$$tt¯ events and exploiting the specific sensitivity of the $$mathrm{t}mathrm{W}$$tW process to new physics.
Print ISSN:
1434-6044
Electronic ISSN:
1434-6052
Topics:
Physics
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